MDedge ObGyn

A new type of electrode made from sugar could help doctors and researchers more effectively monitor contractions during preterm labor, a condition that precedes almost half of preterm births and is the leading cause of U.S. neonatal deaths.

The sensors, developed by engineers at the McKelvey School of Engineering at Washington University, St. Louis, could help us understand why some patients experience preterm labor, improve medical interventions, and save lives. In the experiment, the researchers built an array of the new electrodes and successfully tested it on a pregnant person in a lab.

The goal is a home-monitoring belt that is comfortable enough for patients to wear and accurate enough to be clinically useful. Built off a framework of sugar and conductive polymers, the thin electrodes have a sponge-like quality that allows them to hold more gel than standard electrodes, measure for 3 hours instead of 1, and resist artifacts created by patient movement. When tested on a pregnant woman, the new electrodes picked up clean signals even when the patient moved, said electrical engineer and article co-author Chuan Wang, PhD.

There is current technology that exists to monitor and map contractions during early labor, but the tests require hundreds of wire electrodes. Patients must sit still for half an hour while the electrodes are applied, then remain immobile for the test itself, which has a high sensitivity to movement.

“It’s very uncomfortable. In the clinical setting, the recording typically lasts for 15 minutes to half an hour. During that time, doctors want the patient to be still,” said Dr. Wang. “If the patient has to move, it’s going to introduce some artifacts, which is going to ruin the imaging process.”

Dr. Wang and colleagues wanted to develop an inexpensive new electrode that would be more comfortable for patients to wear for longer periods of time, yet sensitive enough to detect electrical signals in the body during preterm labor.

To do this, they used sugar structures to create a pliable electrode with a spongy structure. The new electrodes have micropores that hold conductive gel, increasing the amount of electrified surface area touching the skin.

“With the porous structure, we are effectively increasing the area by many, many times,” Dr. Wang said. “Because all those voids also contact the skin, increasing the contact area can boost the strength of the signal.”

With conventional electrodes, the gel dries quickly on the flat surface, causing signal quality to plummet. But the new electrodes can be used for “many hours” before drying out, according to Dr. Wang.

Additionally, the soft material of the new electrode acts “like a buffer” that absorbs motion and prevents the electrode from sliding around, according to Dr. Wang. That means patients can move while wearing the spongy electrodes without disturbing the recording of electrical signals in the body.
 

From sugar cube to spongy electrode

To create the new electrode, the researchers began by molding sugar into an electrode-shaped template. The template was then dipped into a liquid polymer, which oozed in between the grains of sugar. Next, the template underwent oven curing, emerging as a solid yet spongy structure. Hot water was then applied to dissolve the sugar.

The sugar structure is useful here because of the negative space around the grains, which is filled by the polymer – and then because of the negative space left when the sugar dissolves.

“When the sugar grains are removed, that’s where the pores are located,” Dr. Wang explained.

The sponge surface was then converted from hydrophobic to hydrophilic, thanks to an oxygen plasma treatment. Next, the sponge was blanketed in a layer of conductive polymer – a liquid that Dr. Wang likens to black ink – transforming it into an electrode. (Without the oxygen plasma step, the sponge wouldn’t have absorbed the conductive material.) After another oven-curing session, the device was affixed with wires and ready to be used.

The researchers are continuing to refine the concept and hope to develop a wireless wearable device with many spongy electrodes that record signals simultaneously – and that patients can use at home.

In addition to monitoring maternal and fetal health during labor, the researchers say the belt-like device could be used for other types of imaging and diagnosis.

“Depending on the scenario, different signals can be recorded,” Dr. Wang said. “It could be an EMG for a pregnant woman, or an ECG for an athlete or a patient with chronic cardiovascular disease that needs monitoring.”

This work was funded by the Bill & Melinda Gates Foundation (INV-005417, INV-035476). The authors acknowledge the Washington University in St. Louis Institute of Materials Science and Engineering for the use of instruments and staff assistance.

A version of this article first appeared on Medscape.com.

A new type of electrode made from sugar could help doctors and researchers more effectively monitor contractions during preterm labor, a condition that precedes almost half of preterm births and is the leading cause of U.S. neonatal deaths.

The sensors, developed by engineers at the McKelvey School of Engineering at Washington University, St. Louis, could help us understand why some patients experience preterm labor, improve medical interventions, and save lives. In the experiment, the researchers built an array of the new electrodes and successfully tested it on a pregnant person in a lab.

The goal is a home-monitoring belt that is comfortable enough for patients to wear and accurate enough to be clinically useful. Built off a framework of sugar and conductive polymers, the thin electrodes have a sponge-like quality that allows them to hold more gel than standard electrodes, measure for 3 hours instead of 1, and resist artifacts created by patient movement. When tested on a pregnant woman, the new electrodes picked up clean signals even when the patient moved, said electrical engineer and article co-author Chuan Wang, PhD.

There is current technology that exists to monitor and map contractions during early labor, but the tests require hundreds of wire electrodes. Patients must sit still for half an hour while the electrodes are applied, then remain immobile for the test itself, which has a high sensitivity to movement.

“It’s very uncomfortable. In the clinical setting, the recording typically lasts for 15 minutes to half an hour. During that time, doctors want the patient to be still,” said Dr. Wang. “If the patient has to move, it’s going to introduce some artifacts, which is going to ruin the imaging process.”

Dr. Wang and colleagues wanted to develop an inexpensive new electrode that would be more comfortable for patients to wear for longer periods of time, yet sensitive enough to detect electrical signals in the body during preterm labor.

To do this, they used sugar structures to create a pliable electrode with a spongy structure. The new electrodes have micropores that hold conductive gel, increasing the amount of electrified surface area touching the skin.

“With the porous structure, we are effectively increasing the area by many, many times,” Dr. Wang said. “Because all those voids also contact the skin, increasing the contact area can boost the strength of the signal.”

With conventional electrodes, the gel dries quickly on the flat surface, causing signal quality to plummet. But the new electrodes can be used for “many hours” before drying out, according to Dr. Wang.

Additionally, the soft material of the new electrode acts “like a buffer” that absorbs motion and prevents the electrode from sliding around, according to Dr. Wang. That means patients can move while wearing the spongy electrodes without disturbing the recording of electrical signals in the body.
 

From sugar cube to spongy electrode

To create the new electrode, the researchers began by molding sugar into an electrode-shaped template. The template was then dipped into a liquid polymer, which oozed in between the grains of sugar. Next, the template underwent oven curing, emerging as a solid yet spongy structure. Hot water was then applied to dissolve the sugar.

The sugar structure is useful here because of the negative space around the grains, which is filled by the polymer – and then because of the negative space left when the sugar dissolves.

“When the sugar grains are removed, that’s where the pores are located,” Dr. Wang explained.

The sponge surface was then converted from hydrophobic to hydrophilic, thanks to an oxygen plasma treatment. Next, the sponge was blanketed in a layer of conductive polymer – a liquid that Dr. Wang likens to black ink – transforming it into an electrode. (Without the oxygen plasma step, the sponge wouldn’t have absorbed the conductive material.) After another oven-curing session, the device was affixed with wires and ready to be used.

The researchers are continuing to refine the concept and hope to develop a wireless wearable device with many spongy electrodes that record signals simultaneously – and that patients can use at home.

In addition to monitoring maternal and fetal health during labor, the researchers say the belt-like device could be used for other types of imaging and diagnosis.

“Depending on the scenario, different signals can be recorded,” Dr. Wang said. “It could be an EMG for a pregnant woman, or an ECG for an athlete or a patient with chronic cardiovascular disease that needs monitoring.”

This work was funded by the Bill & Melinda Gates Foundation (INV-005417, INV-035476). The authors acknowledge the Washington University in St. Louis Institute of Materials Science and Engineering for the use of instruments and staff assistance.

A version of this article first appeared on Medscape.com.

A new type of electrode made from sugar could help doctors and researchers more effectively monitor contractions during preterm labor, a condition that precedes almost half of preterm births and is the leading cause of U.S. neonatal deaths.

The sensors, developed by engineers at the McKelvey School of Engineering at Washington University, St. Louis, could help us understand why some patients experience preterm labor, improve medical interventions, and save lives. In the experiment, the researchers built an array of the new electrodes and successfully tested it on a pregnant person in a lab.

The goal is a home-monitoring belt that is comfortable enough for patients to wear and accurate enough to be clinically useful. Built off a framework of sugar and conductive polymers, the thin electrodes have a sponge-like quality that allows them to hold more gel than standard electrodes, measure for 3 hours instead of 1, and resist artifacts created by patient movement. When tested on a pregnant woman, the new electrodes picked up clean signals even when the patient moved, said electrical engineer and article co-author Chuan Wang, PhD.

There is current technology that exists to monitor and map contractions during early labor, but the tests require hundreds of wire electrodes. Patients must sit still for half an hour while the electrodes are applied, then remain immobile for the test itself, which has a high sensitivity to movement.

“It’s very uncomfortable. In the clinical setting, the recording typically lasts for 15 minutes to half an hour. During that time, doctors want the patient to be still,” said Dr. Wang. “If the patient has to move, it’s going to introduce some artifacts, which is going to ruin the imaging process.”

Dr. Wang and colleagues wanted to develop an inexpensive new electrode that would be more comfortable for patients to wear for longer periods of time, yet sensitive enough to detect electrical signals in the body during preterm labor.

To do this, they used sugar structures to create a pliable electrode with a spongy structure. The new electrodes have micropores that hold conductive gel, increasing the amount of electrified surface area touching the skin.

“With the porous structure, we are effectively increasing the area by many, many times,” Dr. Wang said. “Because all those voids also contact the skin, increasing the contact area can boost the strength of the signal.”

With conventional electrodes, the gel dries quickly on the flat surface, causing signal quality to plummet. But the new electrodes can be used for “many hours” before drying out, according to Dr. Wang.

Additionally, the soft material of the new electrode acts “like a buffer” that absorbs motion and prevents the electrode from sliding around, according to Dr. Wang. That means patients can move while wearing the spongy electrodes without disturbing the recording of electrical signals in the body.
 

From sugar cube to spongy electrode

To create the new electrode, the researchers began by molding sugar into an electrode-shaped template. The template was then dipped into a liquid polymer, which oozed in between the grains of sugar. Next, the template underwent oven curing, emerging as a solid yet spongy structure. Hot water was then applied to dissolve the sugar.

The sugar structure is useful here because of the negative space around the grains, which is filled by the polymer – and then because of the negative space left when the sugar dissolves.

“When the sugar grains are removed, that’s where the pores are located,” Dr. Wang explained.

The sponge surface was then converted from hydrophobic to hydrophilic, thanks to an oxygen plasma treatment. Next, the sponge was blanketed in a layer of conductive polymer – a liquid that Dr. Wang likens to black ink – transforming it into an electrode. (Without the oxygen plasma step, the sponge wouldn’t have absorbed the conductive material.) After another oven-curing session, the device was affixed with wires and ready to be used.

The researchers are continuing to refine the concept and hope to develop a wireless wearable device with many spongy electrodes that record signals simultaneously – and that patients can use at home.

In addition to monitoring maternal and fetal health during labor, the researchers say the belt-like device could be used for other types of imaging and diagnosis.

“Depending on the scenario, different signals can be recorded,” Dr. Wang said. “It could be an EMG for a pregnant woman, or an ECG for an athlete or a patient with chronic cardiovascular disease that needs monitoring.”

This work was funded by the Bill & Melinda Gates Foundation (INV-005417, INV-035476). The authors acknowledge the Washington University in St. Louis Institute of Materials Science and Engineering for the use of instruments and staff assistance.

A version of this article first appeared on Medscape.com.

Key clinical point: Pregnancy-related cardiometabolic condition of any type was associated with almost a 3-fold higher risk for severe cardiovascular outcomes in the perinatal and postnatal periods, with preeclampsia being associated with a 7-fold higher risk for severe cardiovascular outcomes.

Major finding: Risk for severe cardiovascular outcomes was higher in women with vs without pregnancy-related cardiometabolic conditions (adjusted odds ratio [aOR] 3.1; 95% CI 2.7-3.5), with the risk being most prominent for severe preeclampsia (aOR 7.0; 95% CI 5.7-8.6).

Study details: This was a post hoc analysis of the deidentified administrative data of 74,510 women who had at least one delivery during the observation period.

Disclosures: This study did not declare any specific source of funding. The authors did not declare any conflicts of interest.

Source: Marschner S et al. Pregnancy-related cardiovascular conditions and outcomes in a United States Medicaid population. Heart. 2022;108(19):1524-1529 (Sep 12). Doi: 10.1136/heartjnl-2021-320684

Key clinical point: Pregnancy-related cardiometabolic condition of any type was associated with almost a 3-fold higher risk for severe cardiovascular outcomes in the perinatal and postnatal periods, with preeclampsia being associated with a 7-fold higher risk for severe cardiovascular outcomes.

Major finding: Risk for severe cardiovascular outcomes was higher in women with vs without pregnancy-related cardiometabolic conditions (adjusted odds ratio [aOR] 3.1; 95% CI 2.7-3.5), with the risk being most prominent for severe preeclampsia (aOR 7.0; 95% CI 5.7-8.6).

Study details: This was a post hoc analysis of the deidentified administrative data of 74,510 women who had at least one delivery during the observation period.

Disclosures: This study did not declare any specific source of funding. The authors did not declare any conflicts of interest.

Source: Marschner S et al. Pregnancy-related cardiovascular conditions and outcomes in a United States Medicaid population. Heart. 2022;108(19):1524-1529 (Sep 12). Doi: 10.1136/heartjnl-2021-320684

Key clinical point: Pregnancy-related cardiometabolic condition of any type was associated with almost a 3-fold higher risk for severe cardiovascular outcomes in the perinatal and postnatal periods, with preeclampsia being associated with a 7-fold higher risk for severe cardiovascular outcomes.

Major finding: Risk for severe cardiovascular outcomes was higher in women with vs without pregnancy-related cardiometabolic conditions (adjusted odds ratio [aOR] 3.1; 95% CI 2.7-3.5), with the risk being most prominent for severe preeclampsia (aOR 7.0; 95% CI 5.7-8.6).

Study details: This was a post hoc analysis of the deidentified administrative data of 74,510 women who had at least one delivery during the observation period.

Disclosures: This study did not declare any specific source of funding. The authors did not declare any conflicts of interest.

Source: Marschner S et al. Pregnancy-related cardiovascular conditions and outcomes in a United States Medicaid population. Heart. 2022;108(19):1524-1529 (Sep 12). Doi: 10.1136/heartjnl-2021-320684

Key clinical point: A significant and independent association was observed between the serum soluble suppression of tumorigenicity 2 (sST2) and N-terminal probrain natriuretic peptide (NT-proBNP) levels during the second or early-third trimester and the onset of preeclampsia in women with twin pregnancies.

Major finding: Twin pregnancies with vs without preeclampsia were associated with significantly higher maternal serum levels of sST2 and NT-proBNP in the second and early-third trimesters (both P < .001), with a serum sST2 level of ≥30.7 ng/mL (odds ratio [OR] 8.13; P < .001) and NT-proBNP level of ≥282.2 pg/mL (OR 7.20; P < .001) being independently associated with the occurrence of preeclampsia in twin pregnancies.

Study details: Findings are from a longitudinal nested case-control study that included women with dichorionic twin pregnancies from a prospective cohort and compared women with (n = 78) and without (n = 78) preeclampsia.

Disclosures: This study was funded by the National Natural Science Foundation of China. The authors declared no conflicts of interest.

Source: Xiang Q et al. The correlation between maternal serum sST2, IL-33 and NT-proBNP concentrations and occurrence of pre-eclampsia in twin pregnancies: A longitudinal study. J Clin Hypertens (Greenwich). 2022 (Sep 23). Doi: 10.1111/jch.14579

Key clinical point: A significant and independent association was observed between the serum soluble suppression of tumorigenicity 2 (sST2) and N-terminal probrain natriuretic peptide (NT-proBNP) levels during the second or early-third trimester and the onset of preeclampsia in women with twin pregnancies.

Major finding: Twin pregnancies with vs without preeclampsia were associated with significantly higher maternal serum levels of sST2 and NT-proBNP in the second and early-third trimesters (both P < .001), with a serum sST2 level of ≥30.7 ng/mL (odds ratio [OR] 8.13; P < .001) and NT-proBNP level of ≥282.2 pg/mL (OR 7.20; P < .001) being independently associated with the occurrence of preeclampsia in twin pregnancies.

Study details: Findings are from a longitudinal nested case-control study that included women with dichorionic twin pregnancies from a prospective cohort and compared women with (n = 78) and without (n = 78) preeclampsia.

Disclosures: This study was funded by the National Natural Science Foundation of China. The authors declared no conflicts of interest.

Source: Xiang Q et al. The correlation between maternal serum sST2, IL-33 and NT-proBNP concentrations and occurrence of pre-eclampsia in twin pregnancies: A longitudinal study. J Clin Hypertens (Greenwich). 2022 (Sep 23). Doi: 10.1111/jch.14579

Key clinical point: A significant and independent association was observed between the serum soluble suppression of tumorigenicity 2 (sST2) and N-terminal probrain natriuretic peptide (NT-proBNP) levels during the second or early-third trimester and the onset of preeclampsia in women with twin pregnancies.

Major finding: Twin pregnancies with vs without preeclampsia were associated with significantly higher maternal serum levels of sST2 and NT-proBNP in the second and early-third trimesters (both P < .001), with a serum sST2 level of ≥30.7 ng/mL (odds ratio [OR] 8.13; P < .001) and NT-proBNP level of ≥282.2 pg/mL (OR 7.20; P < .001) being independently associated with the occurrence of preeclampsia in twin pregnancies.

Study details: Findings are from a longitudinal nested case-control study that included women with dichorionic twin pregnancies from a prospective cohort and compared women with (n = 78) and without (n = 78) preeclampsia.

Disclosures: This study was funded by the National Natural Science Foundation of China. The authors declared no conflicts of interest.

Source: Xiang Q et al. The correlation between maternal serum sST2, IL-33 and NT-proBNP concentrations and occurrence of pre-eclampsia in twin pregnancies: A longitudinal study. J Clin Hypertens (Greenwich). 2022 (Sep 23). Doi: 10.1111/jch.14579

Key clinical point: Exposure to computed tomography pulmonary angiography (CTPA) in pregnant women with clinically suspected pulmonary embolism (PE) did not lead to neonatal hypothyroidism among newborns.

Major finding: In newborns from pregnant women with suspected PE who underwent CTPA, all reported Guthrie levels were below 15 U/mL, with no newborns with neonatal hypothyroidism (0.0%, 95% CI 0.0%-2.5%).

Study details: The data come from a prospective management outcome study that evaluated 149 pregnant women (including 14 with twin pregnancies) with suspected PE who underwent CTPA.

Disclosures: This study was supported by grants from the Swiss National Foundation for scientific research, Groupe d'Etude de la Thrombose de Bretagne Occidentale, and International Society on Thrombosis and Haemostasis Presidential Grant. The authors declared no conflicts of interest.

Source: Righini M et al for the CT-PE-Pregnancy group. Risk of neonatal hypothyroidism in newborns from mothers exposed to CTPA during pregnancy: Ancillary data from a prospective outcome study. J Thromb Haemost. 2022 (Aug 11). Doi: 10.1111/jth.15843

Key clinical point: Exposure to computed tomography pulmonary angiography (CTPA) in pregnant women with clinically suspected pulmonary embolism (PE) did not lead to neonatal hypothyroidism among newborns.

Major finding: In newborns from pregnant women with suspected PE who underwent CTPA, all reported Guthrie levels were below 15 U/mL, with no newborns with neonatal hypothyroidism (0.0%, 95% CI 0.0%-2.5%).

Study details: The data come from a prospective management outcome study that evaluated 149 pregnant women (including 14 with twin pregnancies) with suspected PE who underwent CTPA.

Disclosures: This study was supported by grants from the Swiss National Foundation for scientific research, Groupe d'Etude de la Thrombose de Bretagne Occidentale, and International Society on Thrombosis and Haemostasis Presidential Grant. The authors declared no conflicts of interest.

Source: Righini M et al for the CT-PE-Pregnancy group. Risk of neonatal hypothyroidism in newborns from mothers exposed to CTPA during pregnancy: Ancillary data from a prospective outcome study. J Thromb Haemost. 2022 (Aug 11). Doi: 10.1111/jth.15843

Key clinical point: Exposure to computed tomography pulmonary angiography (CTPA) in pregnant women with clinically suspected pulmonary embolism (PE) did not lead to neonatal hypothyroidism among newborns.

Major finding: In newborns from pregnant women with suspected PE who underwent CTPA, all reported Guthrie levels were below 15 U/mL, with no newborns with neonatal hypothyroidism (0.0%, 95% CI 0.0%-2.5%).

Study details: The data come from a prospective management outcome study that evaluated 149 pregnant women (including 14 with twin pregnancies) with suspected PE who underwent CTPA.

Disclosures: This study was supported by grants from the Swiss National Foundation for scientific research, Groupe d'Etude de la Thrombose de Bretagne Occidentale, and International Society on Thrombosis and Haemostasis Presidential Grant. The authors declared no conflicts of interest.

Source: Righini M et al for the CT-PE-Pregnancy group. Risk of neonatal hypothyroidism in newborns from mothers exposed to CTPA during pregnancy: Ancillary data from a prospective outcome study. J Thromb Haemost. 2022 (Aug 11). Doi: 10.1111/jth.15843

Key clinical point: Majority of women undergoing medical termination of pregnancy (MTOP) for fetal anomaly at ≥20 weeks’ gestation had successful unassisted deliveries, but a quarter had common or severe morbidities, with the most common morbidities being postpartum hemorrhage and manual removal of retained placental tissue.

Major finding: Overall, 99.0% of women undergoing MTOP for fetal anomaly at ≥20 weeks' gestation had spontaneous vaginal deliveries and 25.5% had a common or severe morbidity, with the most common maternal morbidities being manual removal of retained placental tissue (16.0%) and postpartum hemorrhage (11.1%). Severe maternal morbidity occurred in 1.3% of cases and included amniotic fluid embolism. No maternal deaths were reported.

Study details: Findings are from a 10-year retrospective cohort study including 407 women with singleton pregnancies undergoing MTOP for fetal structure or chromosomal anomaly at ≥20 weeks' gestation.

Disclosures: This study did not report the source of funding. The authors declared no conflicts of interest.

Source: Stewart B et al. Medical termination of pregnancy for fetal anomaly at or beyond 20 weeks' gestation-What are the maternal risks? Prenat Diagn. 2022 (Sep 25). Doi: 10.1002/pd.6241

Key clinical point: Majority of women undergoing medical termination of pregnancy (MTOP) for fetal anomaly at ≥20 weeks’ gestation had successful unassisted deliveries, but a quarter had common or severe morbidities, with the most common morbidities being postpartum hemorrhage and manual removal of retained placental tissue.

Major finding: Overall, 99.0% of women undergoing MTOP for fetal anomaly at ≥20 weeks' gestation had spontaneous vaginal deliveries and 25.5% had a common or severe morbidity, with the most common maternal morbidities being manual removal of retained placental tissue (16.0%) and postpartum hemorrhage (11.1%). Severe maternal morbidity occurred in 1.3% of cases and included amniotic fluid embolism. No maternal deaths were reported.

Study details: Findings are from a 10-year retrospective cohort study including 407 women with singleton pregnancies undergoing MTOP for fetal structure or chromosomal anomaly at ≥20 weeks' gestation.

Disclosures: This study did not report the source of funding. The authors declared no conflicts of interest.

Source: Stewart B et al. Medical termination of pregnancy for fetal anomaly at or beyond 20 weeks' gestation-What are the maternal risks? Prenat Diagn. 2022 (Sep 25). Doi: 10.1002/pd.6241

Key clinical point: Majority of women undergoing medical termination of pregnancy (MTOP) for fetal anomaly at ≥20 weeks’ gestation had successful unassisted deliveries, but a quarter had common or severe morbidities, with the most common morbidities being postpartum hemorrhage and manual removal of retained placental tissue.

Major finding: Overall, 99.0% of women undergoing MTOP for fetal anomaly at ≥20 weeks' gestation had spontaneous vaginal deliveries and 25.5% had a common or severe morbidity, with the most common maternal morbidities being manual removal of retained placental tissue (16.0%) and postpartum hemorrhage (11.1%). Severe maternal morbidity occurred in 1.3% of cases and included amniotic fluid embolism. No maternal deaths were reported.

Study details: Findings are from a 10-year retrospective cohort study including 407 women with singleton pregnancies undergoing MTOP for fetal structure or chromosomal anomaly at ≥20 weeks' gestation.

Disclosures: This study did not report the source of funding. The authors declared no conflicts of interest.

Source: Stewart B et al. Medical termination of pregnancy for fetal anomaly at or beyond 20 weeks' gestation-What are the maternal risks? Prenat Diagn. 2022 (Sep 25). Doi: 10.1002/pd.6241

Key clinical point: The use vs non-use of antihistamines during later stages (20-36 weeks) of pregnancy increased the risk for early-onset preeclampsia in women with allergy, whereas the risk was insignificant with antihistamine use before (<6 months) or during early stages of (<20 weeks) pregnancy.

Major finding: Compared with no antihistamine use, the risk for early-onset preeclampsia (<34 weeks in pregnancy) was high among women with allergy who used antihistamines during late pregnancy (odds ratio [OR] 1.8; 95% CI 1.5-2.2), but was insignificant among those who used antihistamines before or during early pregnancy.

Study details: Findings are from a population-based cohort study including 692,487 pregnancies in women with allergy; 101,287 women used antihistamines either before or during early or late pregnancy.

Disclosures: This study was funded by the University of Bergen. No conflicts of interest were declared.

Source: Sande AK et al. Use of antihistamines before or during pregnancy and risk of early-onset pre-eclampsia in allergic women: A population-based cohort study. BMJ Open. 2022;12(10):e061837 (Oct 7). Doi: 10.1136/bmjopen-2022-061837

Key clinical point: The use vs non-use of antihistamines during later stages (20-36 weeks) of pregnancy increased the risk for early-onset preeclampsia in women with allergy, whereas the risk was insignificant with antihistamine use before (<6 months) or during early stages of (<20 weeks) pregnancy.

Major finding: Compared with no antihistamine use, the risk for early-onset preeclampsia (<34 weeks in pregnancy) was high among women with allergy who used antihistamines during late pregnancy (odds ratio [OR] 1.8; 95% CI 1.5-2.2), but was insignificant among those who used antihistamines before or during early pregnancy.

Study details: Findings are from a population-based cohort study including 692,487 pregnancies in women with allergy; 101,287 women used antihistamines either before or during early or late pregnancy.

Disclosures: This study was funded by the University of Bergen. No conflicts of interest were declared.

Source: Sande AK et al. Use of antihistamines before or during pregnancy and risk of early-onset pre-eclampsia in allergic women: A population-based cohort study. BMJ Open. 2022;12(10):e061837 (Oct 7). Doi: 10.1136/bmjopen-2022-061837

Key clinical point: The use vs non-use of antihistamines during later stages (20-36 weeks) of pregnancy increased the risk for early-onset preeclampsia in women with allergy, whereas the risk was insignificant with antihistamine use before (<6 months) or during early stages of (<20 weeks) pregnancy.

Major finding: Compared with no antihistamine use, the risk for early-onset preeclampsia (<34 weeks in pregnancy) was high among women with allergy who used antihistamines during late pregnancy (odds ratio [OR] 1.8; 95% CI 1.5-2.2), but was insignificant among those who used antihistamines before or during early pregnancy.

Study details: Findings are from a population-based cohort study including 692,487 pregnancies in women with allergy; 101,287 women used antihistamines either before or during early or late pregnancy.

Disclosures: This study was funded by the University of Bergen. No conflicts of interest were declared.

Source: Sande AK et al. Use of antihistamines before or during pregnancy and risk of early-onset pre-eclampsia in allergic women: A population-based cohort study. BMJ Open. 2022;12(10):e061837 (Oct 7). Doi: 10.1136/bmjopen-2022-061837

Key clinical point: Pregnancies complicated by cardiomyopathy are more likely to result in adverse perinatal outcomes, including stillbirth, neonatal mortality, preterm birth, and small-for-gestational age neonates compared to healthy pregnancies or those with no other cardiac diseases.

Major finding: Pregnancies complicated by cardiomyopathy vs healthy pregnancies were more likely to result in stillbirth (odds ratio [OR] 20.82; P < .00001), neonatal mortality (OR 6.75; P < .00001), preterm birth (OR 5.95; P < .00001), and small-for-gestational age neonates (OR 6.74; P < .00001), with outcomes being similar when compared with pregnancies complicated by other forms of cardiac disease.

Study details: Findings are from a systematic review and meta-analysis of 13 observational cohort, case-control, and case-cohort studies including 2,291,024 pregnancies either complicated by cardiomyopathy or other forms of cardiac diseases and those with no cardiac diseases.

Disclosures: CE Aiken was supported by the UK Medical Research Council New Investigator Grant and NIHR Cambridge Biomedical Research Centre, UK. The authors declared no conflicts of interest.

Source: Eggleton EJ et al. Perinatal outcomes in pregnancies complicated by maternal cardiomyopathy: A systematic review and meta-analysis. Am J Obstet Gynecol. 2022 (Sep 20). Doi: 10.1016/j.ajog.2022.09.025

Key clinical point: Pregnancies complicated by cardiomyopathy are more likely to result in adverse perinatal outcomes, including stillbirth, neonatal mortality, preterm birth, and small-for-gestational age neonates compared to healthy pregnancies or those with no other cardiac diseases.

Major finding: Pregnancies complicated by cardiomyopathy vs healthy pregnancies were more likely to result in stillbirth (odds ratio [OR] 20.82; P < .00001), neonatal mortality (OR 6.75; P < .00001), preterm birth (OR 5.95; P < .00001), and small-for-gestational age neonates (OR 6.74; P < .00001), with outcomes being similar when compared with pregnancies complicated by other forms of cardiac disease.

Study details: Findings are from a systematic review and meta-analysis of 13 observational cohort, case-control, and case-cohort studies including 2,291,024 pregnancies either complicated by cardiomyopathy or other forms of cardiac diseases and those with no cardiac diseases.

Disclosures: CE Aiken was supported by the UK Medical Research Council New Investigator Grant and NIHR Cambridge Biomedical Research Centre, UK. The authors declared no conflicts of interest.

Source: Eggleton EJ et al. Perinatal outcomes in pregnancies complicated by maternal cardiomyopathy: A systematic review and meta-analysis. Am J Obstet Gynecol. 2022 (Sep 20). Doi: 10.1016/j.ajog.2022.09.025

Key clinical point: Pregnancies complicated by cardiomyopathy are more likely to result in adverse perinatal outcomes, including stillbirth, neonatal mortality, preterm birth, and small-for-gestational age neonates compared to healthy pregnancies or those with no other cardiac diseases.

Major finding: Pregnancies complicated by cardiomyopathy vs healthy pregnancies were more likely to result in stillbirth (odds ratio [OR] 20.82; P < .00001), neonatal mortality (OR 6.75; P < .00001), preterm birth (OR 5.95; P < .00001), and small-for-gestational age neonates (OR 6.74; P < .00001), with outcomes being similar when compared with pregnancies complicated by other forms of cardiac disease.

Study details: Findings are from a systematic review and meta-analysis of 13 observational cohort, case-control, and case-cohort studies including 2,291,024 pregnancies either complicated by cardiomyopathy or other forms of cardiac diseases and those with no cardiac diseases.

Disclosures: CE Aiken was supported by the UK Medical Research Council New Investigator Grant and NIHR Cambridge Biomedical Research Centre, UK. The authors declared no conflicts of interest.

Source: Eggleton EJ et al. Perinatal outcomes in pregnancies complicated by maternal cardiomyopathy: A systematic review and meta-analysis. Am J Obstet Gynecol. 2022 (Sep 20). Doi: 10.1016/j.ajog.2022.09.025

Key clinical point: Management of shoulder dystocia with fetal manipulation (FM) increased the risk for obstetric anal sphincter injury (OASI), with FM being associated with an increased risk for OASI and severe neonatal morbidity.

Major finding: Shoulder dystocia managed with vs without FM resulted in significantly higher rates of OASI (21.1% vs 3.8%; odds ratio [OR] 6.72; 95% CI 2.7-15.8) but similar rates of severe neonatal morbidity. FM was associated with the occurrence of OASI (adjusted OR [aOR] 5.3; 95% CI 2.2-12.8) and was the only factor associated with severe neonatal morbidity (aOR 2.3; 95% CI 1.1-4.8).

Study details: Findings are from a retrospective observational study including 602 vaginal vertex deliveries in singleton pregnancies, which encountered shoulder dystocia that was managed with (n = 52) or without (n = 550) FM.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Diack B et al. Impact of fetal manipulation on maternal and neonatal severe morbidity during shoulder dystocia management. Arch Gynecol Obstet. 2022 (Sep 23). Doi: 10.1007/s00404-022-06783-y

Key clinical point: Management of shoulder dystocia with fetal manipulation (FM) increased the risk for obstetric anal sphincter injury (OASI), with FM being associated with an increased risk for OASI and severe neonatal morbidity.

Major finding: Shoulder dystocia managed with vs without FM resulted in significantly higher rates of OASI (21.1% vs 3.8%; odds ratio [OR] 6.72; 95% CI 2.7-15.8) but similar rates of severe neonatal morbidity. FM was associated with the occurrence of OASI (adjusted OR [aOR] 5.3; 95% CI 2.2-12.8) and was the only factor associated with severe neonatal morbidity (aOR 2.3; 95% CI 1.1-4.8).

Study details: Findings are from a retrospective observational study including 602 vaginal vertex deliveries in singleton pregnancies, which encountered shoulder dystocia that was managed with (n = 52) or without (n = 550) FM.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Diack B et al. Impact of fetal manipulation on maternal and neonatal severe morbidity during shoulder dystocia management. Arch Gynecol Obstet. 2022 (Sep 23). Doi: 10.1007/s00404-022-06783-y

Key clinical point: Management of shoulder dystocia with fetal manipulation (FM) increased the risk for obstetric anal sphincter injury (OASI), with FM being associated with an increased risk for OASI and severe neonatal morbidity.

Major finding: Shoulder dystocia managed with vs without FM resulted in significantly higher rates of OASI (21.1% vs 3.8%; odds ratio [OR] 6.72; 95% CI 2.7-15.8) but similar rates of severe neonatal morbidity. FM was associated with the occurrence of OASI (adjusted OR [aOR] 5.3; 95% CI 2.2-12.8) and was the only factor associated with severe neonatal morbidity (aOR 2.3; 95% CI 1.1-4.8).

Study details: Findings are from a retrospective observational study including 602 vaginal vertex deliveries in singleton pregnancies, which encountered shoulder dystocia that was managed with (n = 52) or without (n = 550) FM.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Diack B et al. Impact of fetal manipulation on maternal and neonatal severe morbidity during shoulder dystocia management. Arch Gynecol Obstet. 2022 (Sep 23). Doi: 10.1007/s00404-022-06783-y

Key clinical point: A dose of 30 mg oral extended-release nifedipine (ER-nifedipine) every 24 hours until delivery effectively reduced the receipt of treatment for acute severe hypertension in individuals with preeclampsia with severe features.

Major finding: A significantly lower proportion of individuals who received 30 mg ER-nifedipine vs placebo required ≥1 dose of acute hypertension therapy for severe blood pressure that sustained for ≥10 minutes (34.0% vs 55.1%; relative risk 0.62; 95% CI 0.39-0.97). ER-nifedipine vs placebo use led to numerically lower cesarean deliveries (20.8% vs 34.7%) and neonatal intensive care unit admissions (29.1% vs 47.1%).

Study details: Findings are from a phase 4 trial including 110 individuals with singleton or twin gestation undergoing labor induction for preeclampsia with severe features who were randomly assigned to receive 30 mg oral ER-nifedipine or placebo every 24 hours until delivery.

Disclosures: This study was funded by The Ohio State University Department of Obstetrics and Gynecology. No conflicts of interest were declared.

Source: Cleary EM et al. Trial of intrapartum extended-release nifedipine to prevent severe hypertension among pregnant individuals with preeclampsia with severe features. Hypertension. 2022 (Oct 3). Doi: 10.1161/HYPERTENSIONAHA.122.19751

Key clinical point: A dose of 30 mg oral extended-release nifedipine (ER-nifedipine) every 24 hours until delivery effectively reduced the receipt of treatment for acute severe hypertension in individuals with preeclampsia with severe features.

Major finding: A significantly lower proportion of individuals who received 30 mg ER-nifedipine vs placebo required ≥1 dose of acute hypertension therapy for severe blood pressure that sustained for ≥10 minutes (34.0% vs 55.1%; relative risk 0.62; 95% CI 0.39-0.97). ER-nifedipine vs placebo use led to numerically lower cesarean deliveries (20.8% vs 34.7%) and neonatal intensive care unit admissions (29.1% vs 47.1%).

Study details: Findings are from a phase 4 trial including 110 individuals with singleton or twin gestation undergoing labor induction for preeclampsia with severe features who were randomly assigned to receive 30 mg oral ER-nifedipine or placebo every 24 hours until delivery.

Disclosures: This study was funded by The Ohio State University Department of Obstetrics and Gynecology. No conflicts of interest were declared.

Source: Cleary EM et al. Trial of intrapartum extended-release nifedipine to prevent severe hypertension among pregnant individuals with preeclampsia with severe features. Hypertension. 2022 (Oct 3). Doi: 10.1161/HYPERTENSIONAHA.122.19751

Key clinical point: A dose of 30 mg oral extended-release nifedipine (ER-nifedipine) every 24 hours until delivery effectively reduced the receipt of treatment for acute severe hypertension in individuals with preeclampsia with severe features.

Major finding: A significantly lower proportion of individuals who received 30 mg ER-nifedipine vs placebo required ≥1 dose of acute hypertension therapy for severe blood pressure that sustained for ≥10 minutes (34.0% vs 55.1%; relative risk 0.62; 95% CI 0.39-0.97). ER-nifedipine vs placebo use led to numerically lower cesarean deliveries (20.8% vs 34.7%) and neonatal intensive care unit admissions (29.1% vs 47.1%).

Study details: Findings are from a phase 4 trial including 110 individuals with singleton or twin gestation undergoing labor induction for preeclampsia with severe features who were randomly assigned to receive 30 mg oral ER-nifedipine or placebo every 24 hours until delivery.

Disclosures: This study was funded by The Ohio State University Department of Obstetrics and Gynecology. No conflicts of interest were declared.

Source: Cleary EM et al. Trial of intrapartum extended-release nifedipine to prevent severe hypertension among pregnant individuals with preeclampsia with severe features. Hypertension. 2022 (Oct 3). Doi: 10.1161/HYPERTENSIONAHA.122.19751

Key clinical point: Risk for shoulder dystocia was higher among women with gestational diabetes who showed a slowly improving glycemic control trajectory, highlighting the need for interventions that help achieve glycemic targets early after the diagnosis of gestational diabetes.

Major finding: Compared with women showing rapid improvements to attain optimal glycemic control, the risk for shoulder dystocia was higher among women showing slow improvements to attain suboptimal glycemic control (adjusted relative risk [aRR] 1.41; 95% CI 1.12-1.78) and was lower among women with stably optimal glycemic control from diagnosis to delivery (aRR 0.75; 95% CI 0.61-0.92).

Study details: Findings are from a population-based longitudinal cohort study including 26,774 women with gestational diabetes who received prenatal care.

Disclosures: This study was supported by the National Institute of Diabetes and Digestive and Kidney Diseases and other sources. The authors did not declare any conflicts of interest.

Source: Chehab RF et al. Glycemic control trajectories and risk of perinatal complications among individuals with gestational diabetes. JAMA Netw Open. 2022;5(9):e2233955 (Sep 29). Doi: 10.1001/jamanetworkopen.2022.33955

Key clinical point: Risk for shoulder dystocia was higher among women with gestational diabetes who showed a slowly improving glycemic control trajectory, highlighting the need for interventions that help achieve glycemic targets early after the diagnosis of gestational diabetes.

Major finding: Compared with women showing rapid improvements to attain optimal glycemic control, the risk for shoulder dystocia was higher among women showing slow improvements to attain suboptimal glycemic control (adjusted relative risk [aRR] 1.41; 95% CI 1.12-1.78) and was lower among women with stably optimal glycemic control from diagnosis to delivery (aRR 0.75; 95% CI 0.61-0.92).

Study details: Findings are from a population-based longitudinal cohort study including 26,774 women with gestational diabetes who received prenatal care.

Disclosures: This study was supported by the National Institute of Diabetes and Digestive and Kidney Diseases and other sources. The authors did not declare any conflicts of interest.

Source: Chehab RF et al. Glycemic control trajectories and risk of perinatal complications among individuals with gestational diabetes. JAMA Netw Open. 2022;5(9):e2233955 (Sep 29). Doi: 10.1001/jamanetworkopen.2022.33955

Key clinical point: Risk for shoulder dystocia was higher among women with gestational diabetes who showed a slowly improving glycemic control trajectory, highlighting the need for interventions that help achieve glycemic targets early after the diagnosis of gestational diabetes.

Major finding: Compared with women showing rapid improvements to attain optimal glycemic control, the risk for shoulder dystocia was higher among women showing slow improvements to attain suboptimal glycemic control (adjusted relative risk [aRR] 1.41; 95% CI 1.12-1.78) and was lower among women with stably optimal glycemic control from diagnosis to delivery (aRR 0.75; 95% CI 0.61-0.92).

Study details: Findings are from a population-based longitudinal cohort study including 26,774 women with gestational diabetes who received prenatal care.

Disclosures: This study was supported by the National Institute of Diabetes and Digestive and Kidney Diseases and other sources. The authors did not declare any conflicts of interest.

Source: Chehab RF et al. Glycemic control trajectories and risk of perinatal complications among individuals with gestational diabetes. JAMA Netw Open. 2022;5(9):e2233955 (Sep 29). Doi: 10.1001/jamanetworkopen.2022.33955