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Maternal height as a risk factor for Caesarean section.

BACKGROUND: Maternal height has been reported as an obstetric risk factor, since short maternal stature may be associated with an increased incidence of obstructed labour due to cephalopelvic disproportion. MATERIALS AND METHODS: There were 373 nulliparous women who were 150 cm or less in height (total n=5,650) and 367 women who were below 19 years old in the study group and 48 of these women were 150 cm or less in height. There were 37 patients who were 150 cm or less in height and over 39 years old. RESULTS: There was no statistically significant difference between the rates of Caesarean section in patients who were 150 cm or less in height and patients who were taller than 150 cm (P>0.05). However, the rate of Caesarean section was higher in patients who were 150 cm or less in height and below 19 years old (P<0.05) and over 39 years old (P<0.05). CONCLUSION: Short maternal height (<150 cm) was not associated with a greater likelihood of Caesarean section for cephalopelvic disproportion. However, patients who were below 19 years old and over 39 years old with a height of 150 cm or smaller had a greater likelihood of undergoing Caesarean section.

Adolescent↗

Changing trends in cesarean section.

There have been considerable changes in obstetric practice in the past 5 years, with corresponding changes in the application of ceasarean section to obstetric complications. In this paper, 4,003 cesarean sections done in a public hospital during four time periods dating back to 1948 are compared, and the changing applications of section are discussed. Breech presentation, fetal distress, and dystocia have contributed substantially to the increasing use of abdominal delivery.

Anesthesia, Inhalation↗

Defects of the central nervous system in Finland. IV. Associations with diagnostic x-ray examinations.

Based on the Finnish Register of Congenital Malformations a search was undertaken to find possible associations between defects of the CNS and diagnostic x-ray examinations of the mother during pregnancy as well as pelvic x-ray examinations prior to pregnancy. Time-area--matched pregnancies and polydactylic children were used as controls. The risk of having a microcephalic child was increased for mothers with pelvic x-ray prior to pregnancy, but the number of discordant pairs was small. Of the examinations performed during pregnancy, fetal x-ray was significantly more common among mothers who delivered a CNS-defective child. No associations were observed for other kinds of examinations.

Abnormalities, Radiation-Induced↗

Growth of the birth canal in adolescent girls.

The growth and development of four dimensions of the pelvic birth canal are analyzed from a longitudinal sample of 9 well-nourished girls aged 8 through 18. Compared with stature, the pelvic basin grows more slowly and continuously through late adolescence. Similarly, size of the birth canal is smaller the first 3 years past menarche than at age 18. At low gynecologic ages, a significantly greater percentage of growth to adult size is required in the pelvis as compared to stature, and growth of the birth canal continues beyond the asymptote for statural increase. The pelvis is smaller and less mature among girls with early menarche than among girls with late menarche at the same menarcheal ages. These results indicate that immaturity of the birth canal of the pelvis may have significance for obstetric risks among young teenage primiparous girls.

Adolescent↗

Preinduction cervical ripening with sequential use of prostaglandin E2 gel.

Two hundred patients received a prostaglandin E2-containing gel for preinduction cervical ripening. The gel was administered every 6 hours until a Bishop score greater than or equal to 7 was obtained or the attending physician deemed induction necessary. Forty-eight percent of the patients labored "spontaneously" after one or more gel applications. The average cumulative change in Bishop score with sequential application of the gel was 2.7. Sequential application of the prostaglandin gel proved no more effective in the process of preinduction cervical ripening than single application of the gel with a similar period of observation.

Cervix Uteri↗

Factors related to the increasing cesarean section rates for cephalopelvic disproportion.

At the Highland Park Hospital the increase in cesarean section rates has paralleled the national increase. Data from cesarean deliveries performed for cephalopelvic disproportion (a leading reason for cesarean section) in 1969 to 1972 (group 1) and 1979 to 1982 (group 2) were evaluated to determine maternal, fetal, and delivery factors that might be related to the increase in the rates. The data suggested that the more frequent diagnosis of cephalopelvic disproportion and the increased size of the group 2 infants were the primary reasons for the increase in cesarean section rate. This increased rate was paralleled by a decline in forceps-assisted delivery and in perinatal mortality rates.

Adult↗

Volume changes within the true pelvis during disruption of the pelvic ring--where does the haemorrhage go?

Fractures of the pelvis are not only common but are very varied in their complexity. They represent 3% of all fractures (1), they account for 1 in every 1000 surgical admissions and are the third most commonly encountered injury in motor vehicle accident fatalities (2). However, only a small percentage of all pelvic fractures are associated with major disruption of the pelvic ring (3). Life threatening haemorrhage is a frequent complication of major pelvic fractures (1, 4) and haemorrhage is the leading cause of death in these patients (5, 6). It was believed that fracture and subsequent displacement of the ring greatly increased pelvic volume. However, clinical practice seemed to indicate that this might not be true. This study aimed to assess the change in pelvic volume which occurs in severely displaced pelvic fractures. A model of the bony pelvis was designed to permit extreme displacements of the symphyseal and sacroiliac joints. The volume of a polythene balloon placed within the true pelvis was measured as an indication of true pelvic volume. Our finding was that the increase in the volume of the true pelvis which occurs in a fracture with massive diastasis is much smaller than previously assumed.

Fractures, Bone↗

Vaginal delivery following previous cesarean section in 1983.

In 1983 the question whether or not to perform vaginal delivery following previous cesarean section is again presented to the obstetrical community. Data are presented on 778 patients managed during the decade January 1, 1973 to December 31, 1982. Four hundred seventy-six had scheduled repeat cesarean section on an elective basis. One hundred sixty-five experienced normal vaginal delivery. One hundred thirty-seven failed the attempt and were delivered by cesarean section. The group that delivered vaginally and scheduled elective cesarean section did well. However, in the failed attempt the problems were awesome regardless of indication or number of previous cesarean sections.

Apgar Score↗