Prevalencia y resultados perinatales adversos en adolescentes con diabetes mellitus gestacional según tres criterios diagnósticos internacionales / Prevalence and adverse perinatal outcomes in adolescent women with gestational diabetes mellitus according to three criteria international diagnostics

Resumen: OBJETIVO: comparar la prevalencia y resultados perinatales adversos de la diabetes mellitus gestacional en mujeres embarazadas adolescentes utilizando tres criterios diagnósticos internacionales diferentes. MATERIAL Y MÉTODOS: estudio comparativo y observacional de cohorte retrospectiva efectuado en adolescentes a quienes se tomó una curva de tolerancia oral a la glucosa de 75g-2 h, entre las 24 y 28 semanas de gestación. Se analizaron la prevalencia y los resultados perinatales adversos, con criterios del Fifth International Workshop-Conference on Gestational Diabetes Mellitus, International Association of Diabetes and Pregnancy Study Groups y National Institute for Health and Care Excellence. RESULTADOS: se estudiaron 493 adolescentes en quienes se obtuvo una prevalencia de diabetes mellitus gestacional de: 0.2, 6.3 y 1.8%, con los criterios del Fifth International Workshop-Conference on Gestational Diabetes Mellitus, International Association of Diabetes and Pregnancy Study Groups y National Institute for Health and Care Excellence, respectivamente. La prevalencia de diabetes mellitus gestacional fue significativamente mayor con los criterios de la International Association of Diabetes and Pregnancy Study Groups, sin diferencias significativas en los resultados perinatales adversos al utilizar cualquiera de los tres criterios. CONCLUSIÓN: la prevalencia de diabetes mellitus gestacional según los criterios de la International Association of Diabetes and Pregnancy Study Groups es 3 veces mayor que con los criterios del National Institute for Health and Care Excellence y 30 veces mayor con los criterios de la Fifth International Workshop-Conference on Gestational Diabetes Mellitus. No hubo riesgo incrementado de resultados perinatales adversos en adolescentes con diabetes mellitus gestacional; sin embargo, podrían tener mayor riesgo de padecer diabetes mellitus tipo 2 a largo plazo.

Abstract: OBJECTIVE: To compare the prevalence and perinatal outcomes of gestational diabetes mellitus in adolescent women using three international diagnostics criteria. METHODS: An observational retrospective cohort study, 493 adolescents were included, an oral glucose tolerance test 75g-2 h was performed, between 24 and 28 weeks of gestation, the prevalence and adverse perinatal outcomes was analyzed, with criteria of Fifth International Workshop-Conference on Gestational Diabetes Mellitus, International Association of Diabetes and Pregnancy Study Groups and National Institute for Health and Care Excellence. RESULTS: The prevalence of gestational diabetes mellitus was: 0.2%, 6.3% and 1.8%, with the criteria of Fifth International Workshop-Conference on Gestational Diabetes Mellitus, International Association of Diabetes and Pregnancy Study Groups and National Institute for Health and Care Excellence, respectively. The prevalence of gestational diabetes mellitus was significantly higher with criteria of the International Association of Diabetes and Pregnancy Study Groups; there were no significant differences among adverse perinatal outcomes when using any of the three criteria. CONCLUSION: Prevalence of gestational diabetes mellitus using the criteria of the International Association of Diabetes and Pregnancy Study Groups is 3 times higher than National Institute for Health and Care Excellence criteria and 30 times higher than the Fifth International Workshop-Conference on Gestational Diabetes Mellitus criteria. There was no increased risk of adverse perinatal outcomes in adolescents with gestational diabetes mellitus; however, adolescents may be at increased risk of developing type 2 diabetes mellitus long term.

[Within the limits of viability: the dilemma of the obstetrician. A 5-year experience at a perinatal care center]. / En los límites de la viabilidad: el dilema del obstetra. Experiencia de cinco años en un Centro de Atención Perinatal.

The study was performed in order to establish the obstetric factors that influence survival of newborns whose birth weight is under 1000 g. All medical records of babies with such birth weight, born alive at the Instituto Nacional de Perinatología in Mexico City during the period from 1991 to 1996 were revised. Babies with congenital malformations, cromomosomopathies or those who after birth were referred to another medical center were excluded. Survival status was used to form two study groups: those who were discharged alive and those who died during their hospital stay. Different obstetric conditions on management were compared between these two groups. Statistical Analysis was performed through t-test, chi square or exact Fisher's test. Two hundred and ninety two cases were included out of 294. Sixty nine (25.4%) survived while 203 (74.6%) died during their hospitalization. Several obstetric conditions were found to have statistical differences between survivors (S) and non survivors (NS): cervical dilatation on admittance to hospital (1.6 cm among S and 2.7 among NS), cervical dilatation prior to resolution (3.3 cm S vs 4.9 cm NS), gestational age (28.3 vs 27 weeks). Newborn conditions also showed significant statistical differences as in birth weight (867.1 vs 795.5 g), 1 minute Apgar (4.1 vs 2.5), and 5 min Apgar (6.9 vs 5). Use of antepartum steroids showed a striking difference between groups while duration of labor, usage of oxitocin and way of delivery showed no statistical differences. Gestational age (over 28 weeks), birth weight (above 867 g) and the use of antepartum steroids are of extreme importance in the survival status of babies born weighting less than 1000 g.

[Transabdominal cerclage in the management of cervical incompetence]. / Cerclaje transabdominal en el manejo de la incompetencia cervical.

The Transabdominal Cerclage in the Cervical Incompetence. The purpose of this study was to assess the transabdominal cerclage indications at the Instituto Nacional de Perinatología. A retrospective study was carried on in order to evaluate fetal outcome in all patients with transabdominal cerclages. Since 1997 seven transabdominal cerclages were performed. The primary indication was unsuccessful previous vaginal cerclage. All seven patients delivered at term. The rate of live births before the procedure was 5.2% compared to 85.8% after the transabdominal cerclage. There was one still birth a the gestational of 37.2 in a woman with preeclampsia. Five newborns were small for gestational age. In our study the transabdominal cerclage, under strict indications, offers a high fetal survival rate with a minimum of complications in patients with a poor obstetric history due to cervical incompetence and unsuccessful vaginal cerclage.

[Repeat cesarean section: a necessary procedure?]. / Cesárea de repetición: Una cesárea necesaria?

The purpose of this study was to identify the clinical indications for the repeated cesarean section (RCS). In order to determine if the indication was an absolute or a relative one and to establish if it was justified. This is a cross sectional study of all patients with a previous cesarean delivery who underwent a RCS from January 1996 to December 1997 at the National Institute of Perinatology. Multiple pregnancies were excluded. According to the indication two groups were identified: those with an absolute indications and those with a relative one. In order to assess the differences between both groups data were analyzed through chi square test or Fisher's Exact test. During the study period there were 5,545 cesarean deliveries, 664 were RSC (11.9%). Only 641 of the RCS complied with the inclusion criteria for the study. Average maternal age was 30 years. More than half the patients under study (57.2%) did not have any pathological condition during pregnancy, and the rest (42.7%) had at least one (preeclampsia, diabetes mellitus/gestational, chronic hypertension). Indications for the previous cesarean section were absolute in 25.9% and relative in 74.1% (p = 0.0006). Indications for the RCS were also predominantly relative (70.7%), with only 29.3%) absolute (p = 0.0001). The main RCS indications were: elective (20.1%) cephalopelvic disproportion (17.8%), preeclampsia (15.4%), fetal distress (8%). Trial for vaginal delivery was undertaken in 65.4% of the absolute indications group and in 36.9% of the relative indications group (p = 0.0001). Low Apgar one minute and five minute scores were more frequent among the absolute indications group (p = 0.03 and p = 0.01 respectively). Newborns having had an absolute cesarean delivery indication entered the National Intensive Care Unit more frequently (53.6%) than those with relative indications (46.4%) (p = 0.001). The main indication for RCS in our hospital were relative, and thus it is possible to reduce the cesarean rate through a thorough assessment of all cases with a previous cesarean section, and by giving a delivery trial of all this patients.

[Advanced maternal age and pregnancy: how much is too much?]. / Edad materna avanzada y embarazo: qué tanto es tanto?

Perinatal evolution was compared and two study groups in women with advanced maternal age and pregnancy. 626 were included from a total of 778 with age 35 years, who resolved their pregnancy during 1995. They were classified, according to age, in two groups: 1) maternal age of 35-39 year; they were considered primigestas and multigestas. Perinatal complications were classified in personal antecedent, antepartum and intrapartum complications. To analyze the association between maternal age and parity with perinatal complications, X2 or exact test of Fisher, was used. Percentage of women with advanced age and pregnancy was 13.6%. Main perinatal complications were: preeclapmsia, gestational diabetes, preterm delivery threat, and membranes rupture. There were no significant differences as to complications by age and parity. There were 90% of children with 2500 g, and Apgar of 97%. Perinatal death was 0.4%, and fetal malformation 0.6%. Cesarean frequency, was over 90% in primigestas and in more of 60% in multigestas. Perinatal evolution in advanced age and pregnancy is adequate, if she starts prenatal control early enough.

[Cesarean section: science or anxiety? Eleven years of institutional experience]. / Operación cesárea: ciencia o ansiedad? Once años de experiencia institucional.

The increasing rise of cesarean section rate invites to analyze its indications. The present study was done from 1985 to 1995, which means 11 years of study with 38,407 cases. Frequency and clinical indications were analyzed. As to births, frequency was 40.6%. Main causes were: Iterative section 38.2%; cephalopelvic disproportion 28.1%; pelvic presentation, 23.4%; hypertensive disease in pregnancy 16.3%; and acute fetal suffering, 10.9%. The careful observation of indications in every institution, may produce better reasons for reducing such high indexes.

[Gestational trophoblastic disease. A 6-year experience at the Instituto Nacional de Perinatología]. / Enfermedad trofoblástica gestacional. Experiencia de 6 años en el Instituto Nacional de Perinatología.

From January, 1988 to March, 1994, 83 patients with diagnosis of gestational trophoblastic disease, were identified. Incidence was 2.4 per 1000 births. Average age of patients was 28.9 years. Forty four point five per cent of them were multiparae and in 25.3% there was the antecedent of molar pregnancy. Seventy seven point one per cent of the cases are from low socioeconomic stratum. The diagnosis was done by ultrasound in 89.1%. Instrumental uterine curettage was done in 89.1%, with histological confirmation in 100% of the cases. From the 83 cases with molar pregnancy, 74 were classified as complete moles, four, incomplete, four, invasive and one choriocarcinoma. There was follow up in all the patients with beta fraction of chorionic gonadotropin hormone; this was negative in most of the cases for eight weeks after evacuation. Oral contraceptives were indicated in 73.4% of the cases.

[Persistent trophoblastic tumor. Report of 15 cases at the National Institute of Perinatal Medicine]. / Tumor trofoblástico persistente. Informe de 15 casos del Instituto Nacional de Perinatología.

Fifteen (18%) out of 83 patients with gestational trophoblastic disease, developed persistent trophoblastic tumor, from January, 1988 to March, 1994. Average age of patient was 25.5. There was antecedent of molar pregnancy in two cases. Beta fraction of chorionic gonadotrophin hormone at the time of diagnosis was 152,200 m UI/ml, average. During control it was in 80% of anovulatory oral cases. The treatment was based on metotrexate, and folinic acid; there was 100% remission. There was a total of 46.6% of pregnancies, after treatment; and 40% of them were normal.

[Placenta praevia/accreta and previous cesarean section. Experience of five years at the Mexico National Institute of Perinatalogy]. / Placenta previa/acreta y cesárea previa. Experiencia de cinco años enel Instituto Nacional de Perinatología.

Two hundred and ten cases with placenta previa, were reviewed (1989-1994). In 37 (17.6%) placenta accreta was present. From accretism cases in 26 (70.2%) only, there was the antecedent of cesarean section. Average age was 31 years; the highest risk group was 35-39 years with 26% of cases of accretism. Average parity was three, in the group of five gestaes, 33.3% developed placenta accreta. In the group without antecedent of cesarean section, accretism risk was 9.4%; with one section was 21.1%, but with two or more cesarean sections, it was 50%. In the presence of placenta previa advanced maternal age, and two or more cesarean sections, placenta accreta risk is high.

[Multiple (quadruple) pregnancy involving complete hydatidiform mole and 3 fetuses]. / Embarazo múltiple de alto orden fetal (cuádruple), involucrando mola hidatidiforme completa y tres fetos.

The rate of hydatidiform mole in our country oscillates from 1:144 to 1:552 pregnancies. We report the second case of hydatidiform mole coexisting with a spontaneous multiple pregnancy (three fetuses and one hydatidiform mole). The patient was a 34 year old woman. She had not received hormonal therapy for anovulation. At 13th weeks of gestation she presented vaginal spotting and hyperemesis. An ultrasonographic examination revealed three living fetuses and the multiple cystic echo typical of an hydatidiform mole. At 14 weeks of pregnancy she was diagnosed to have clinical symptoms of severe preeclampsia. We did not have an adequate response to the antihypertensive drugs and the patient underwent therapeutic termination of the pregnancy. The thyroid hormones were in normal levels. The serum beta-hCG was up to 500,000 mU/ml. Two fetuses were female weighing 55 g. each one. One fetus was male weighing 50 g. All of them had a normal karyotype. The patient development a gestational trophoblastic disease. These have been only three reports of complete hydatidiform mole in triplet pregnancy with two fetuses. These cases were pregnancies occurring after ovulation inducing therapy. We analyzed the clinical aspects and treatment of hydatidiform mole coexisting with multiple pregnancy.

[Placenta praevia. Maternal and perinatal repercussions. Analysis of 170 cases]. / Placenta previa. Repercusiones maternas y perinatales. Análisis de 170 casos.

One hundred and seventy cases with placenta previa, at Instituto Nacional de Perinatología, from 1989 to 1993, were reviewed. Incidence in our population was 0.62%; average maternal age was 31 years; the greater amount of cases was among nulliparae; in 72% of them there was the antecedent of uterine scar. Ultrasound diagnosis was done in 81% of the patients, and most frequent placental insertion type was the low one in 49%, and in 31%, total, central placenta. The first hemorrhagic episode occurred at a gestational age of 34 weeks. Most frequent complication was threatening pre-term delivery, and ethinyl adrianol was used as uterine inhibitor. All pregnancies were interrupted, via abdominal. Placental accretion was a frequent complication. Hemorrhage during the second half of gestation is one of the main causes of perinatal morbidity-mortality. Frequency of this complication is from 3% to 5%, of all pregnancies in an open population; and when it appears, is one of the most serious urgencies; so its early diagnosis and opportune treatment will diminish maternal and perinatal morbidity-mortality. Etiology is unknown, but diminished endometrial vascularization, at fundus and body, may be the causal factor. There are other predisposing causes as age, advanced maternal age, multiparity, tumours, scars and smoking. The objective of this study, was to analyze maternal and perinatal repercussions, of placenta previa, based on the experience at Instituto Nacional de Perinatología.

[HELLP syndrome. 7-year experience at the National Institute of Perinatology]. / Síndrome Hellp. Siete años de experiencia en el Instituto Nacional de Perinatología.

We studied 36 patients with Hellp syndrome and her newborn during seven years in the National Institute of Perinatology (INPer). The objective of this study is show the epidemiology and clinic features, unite diagnostic criteria and classification, furthermore establish morbidity and mortality maternal and perinatal. The 44.6% (16/36) was type I, and 55.6% (20) was type II. The average of pregnancies was 3. The 38.9% (14/36) received regular prenatal control. Both types were more common in patients with preterm pregnancies, between 28-36 weeks. The patients with severe preeclampsia and eclampsia were more common. The cases with type I had more complications and stayed on hospital more time. The maternal mortality was 5.55%. Perinatal outcomes were unsatisfactory, with high incidence of asphyxiated newborn. The newborn of patients with type I had more severe complications and stayed more time on the hospital. The perinatal mortality was 32.43%.