Availability and Attitudes of Residents to the Provision of Abortion Services

Objectives: to determine the training and attitudes of obstetric and gynaecology residents to the provision of abortion services.Design: a cross-sectional survey.Setting: Canadian obstetrics and gynaecology residency programmes.Interventions: a 15 item questionnaire exploring exposure to and training in abortion services, including the various techniques of pregnancy termination, counselling services, management of complications, and any negative effects experienced by those who chose not to perform these procedures during their training. Residents were also asked to indicate if they felt abortion training should be made a compulsory component of training programmes.Results: one hundred and fifty-two out of a possible two hundred and sixty-six surveys were returned for a return rate of 57 percent. Sixty-six percent of residents who responded were willing to perform therapeutic abortions as part of their residency training programme and 52 percent planned to continue with this practice after graduating. Ninety-three percent of all responding residents felt competent to perform first trimester terminations and 62 percent felt competent to perform terminations using the intra-amniotic injection technique. Forty-two percent of residents felt competent to perform second trimester dilatation and evacuation procedures.Of those who chose not to perform abortions, 34 percent did so for moral or religious reasons. Eighty-nine percent of residents felt that they were adequately trained to manage abortion complications and 86 percent received training in sexually transmitted diseases and contraceptive counselling. Thirty percent of residents felt that abortion training should be made compulsory and three percent of residents experienced adverse effects for refusing to perform abortions.Conclusions: Canadian residency programmes offer residents a high level of exposure to the various aspects of abortion training, including the acquisition of technical skill, management of complications, and patient counselling. The majority of residents did not feel that abortion training should be made a compulsory component of their training programme.Continued attention to this aspect of the specialty training curriculum is required to ensure that the continuing demands for abortion services can be met.     

The effect of obstetric resident gender on forceps delivery rate

OBJECTIVE: This study was undertaken to examine the effect of obstetric resident physician gender on the forceps delivery rate. Study Design: Analysis was based on >350,000 deliveries performed by >800 residents in obstetrics and gynecology throughout the United States from 1994 to 1998. A chi(2) analysis was performed on resident statistics from residency review committee report forms. RESULTS: The percentage of total deliveries performed with forceps during residency was significantly higher among male residents (P <. 0001), as was the percentage of vaginal deliveries performed with forceps during residency (P <.0001). The percentage of overall operative vaginal deliveries (vacuum plus forceps) was significantly higher for male residents (P <.0001); however, the percentage of vacuum deliveries did not vary according to gender of the resident when considered independently. CONCLUSION: These results strongly suggest that resident gender affects performance of forceps delivery.     

Abortion training in Canadian obstetrics and gynecology residency programs

OBJECTIVE: To study abortion training in Canadian obstetrics and gynecology (ob-gyn) residency programs. METHODS: An anonymous questionnaire was sent to all postgraduate year (PGY)-4 and PGY-5 ob-gyn residents (n=130) and residency program directors (n=16) in Canada. The questionnaires inquired about demographic information, details of abortion training, resident participation in training, and intention to provide abortions after residency. RESULTS: Ninety-two of 130 residents (71%) and 15 of 16 program directors (94%) responded. Abortion training is considered routine in approximately half of programs and elective in half. The majority of residents (71%) participated in abortion training, and half plan to do elective abortions after residency. More than half of residents felt competent after training to perform first-trimester aspiration and second-trimester inductions but did not feel competent in first-trimester medical abortions or dilation and evacuation (D&E). Residents were more likely to participate in training if the program arranged the training for residents (P=.04) and were more likely to intend to provide abortions if the training was considered routine (P=.02), while controlling for all significant demographic and training variables. CONCLUSION: Most Canadian ob-gyn programs offer some training in elective abortion, but only half include it routinely in training, and the minority of residents feels competent in D&E and medical abortion. Integrated abortion training was associated with greater resident participation in training and increased likelihood of intention to provide abortions after residency.     

Forceps and vacuum delivery: expectations of residency and fellowship training program directors.

The objective of this study is to compare current forceps training practices in North American obstetrical residency training programs with that in maternal-fetal medicine fellowship programs. We sent a survey to all obstetrics and gynecology residency training programs and to all maternal-fetal medicine fellowship programs in North America. After sending out 354 questionnaires, 219 were returned for a response rate of 62%. The response rate for fellowship programs (52 of 59; 88%) was significantly greater than that of residency training programs (167 of 295; 56.6%) (p < 0.05). All fellowship training programs were using the 1988 ACOG forceps classification system, as were 98% of the residency training programs. Eighty-five percent of fellowship directors and 80% of residency directors felt the same system should be used for vacuum deliveries. All residency and fellowship directors expected proficiency with both instruments for outlet deliveries. For low deliveries requiring < or =45 degrees of rotation, at least 92% expected proficiency with both instruments. For low-forceps deliveries with >45 degrees of rotation, 82% of fellowship directors and 80% of residency directors expected proficiency. For low-vacuum deliveries with >45 degrees of rotation, 80% of fellowship directors and 76% of residency directors expected proficiency. Significantly more fellowship directors expected midforceps proficiency (47%) than did residency program directors (38%) (p < 0.05). Midvacuum proficiency was expected by 73% of fellowship directors and 69% of residency directors. The ACOG 1988 forceps classification system has now achieved wide acceptance and is taught by both residency and fellowship program directors. Most program directors favor using the same classification system for vacuum extraction deliveries. In general, the expectations of the residency program directors mirror those of maternal-fetal medicine fellowship directors. While outlet and low operations with < or =45 degrees of rotation are taught and proficiency is expected, most programs no longer expect proficiency in midforceps delivery, but do expect proficiency in midvacuum delivery. Proficiency in low operations with rotations < or =45 degrees is still expected.     

Temporal trends and morbidities of vacuum,forceps, and combined use of both

Abstract

Objective: To assess trends over time of operative vaginal delivery and compare delivery-related morbidity between vacuum delivery, forceps delivery, or combined use of both in California.

Methods: California ICD-9 discharge data from 2001 to 2007 were used to identify cases of forceps and vacuum delivery.

Results: There was a decline in all operative delivery types (9.0% in 2001 to 7.6% in 2007), with the decline in the use of forceps most pronounced (7.26/1000 deliveries in 2001 to 3.85/1000 in 2007). Higher rates of third/fourth degree lacerations, postpartum hemorrhage, manual extraction of placenta, pelvic hematoma requiring evacuation, cervical laceration repair, and thromboembolic events were noted in forceps compared to vacuum deliveries. When both instruments were used, rates of third/fourth degree lacerations and postpartum hemorrhage were increased. Operative delivery failure was highest in combined use compared to forceps or vacuum alone.

Conclusion: The incidence of operative vaginal delivery in California is declining, with decreasing use of forceps most notable. Several maternal morbidities are increased in forceps and combined deliveries compared to vacuum deliveries. There is a significantly higher risk of failure when two operative delivery methods are employed. These findings may be contributing to the declining willingness of providers to perform operative vaginal delivery.     

Instrumental extraction in 2002 in the "AURORE" hospital network: incidence and serious neonatal complications

OBJECTIVES: The purpose of this study was to evaluate the incidence of forceps and vacuum application and the incidence of its related neonatal complications. This study was performed in a network of 37 maternity hospitals. PATIENTS AND METHOD: A postal questionnaire was sent to 156 obstetricians between February and March 2003. RESULTS: Response rate was 78%. In 2002 the operative vaginal delivery rate was 11.2% of all live births. Forceps are the primary instruments (6.3%) whereas vacuum delivery rate was 4.9%. One obstetrician never uses forceps while 38 (31%) never use vacuum. Only 29 (24%) report using both instruments frequently. During 2002 no neonatal death related to an operative vaginal delivery was reported while 145 neonatal complications were (3.2%). Major complications were one depressed skull fracture (1/4589) and 14 extensive caput succedaneum (14/4589). Minor complications were cutaneous lesions (124/4589) and facial palsy (6/4589). Vacuum delivery was associated with a significantly higher extensive caput succedaneum rate (P = 0.018) while the only depressed skull fracture observed was related to forceps use. Forceps delivery was associated with a significantly higher cutaneous lesions rate (P < 0.001). DISCUSSION AND CONCLUSIONS: This study showed that, in 2002, operative vaginal deliveries still represent a significant amount of vaginal deliveries, a majority of obstetricians do not use both instrument and neonatal associated complications are frequent (3.2%) but rarely severe. Therefore, we believe that every method that allows a safe teaching of operative delivery should be promoted.     

Decision-to-delivery interval for instrumental vaginal deliveries: vacuum extraction versus forceps

Objective: The aim of this study was to assess the decision-to-delivery interval for forceps delivery and vacuum extraction. Study design: A retrospective analysis of all instrumental deliveries over a 1-year period in a delivery ward of a university tertiary health care facility was performed. The decision-to-delivery interval was compared between forceps delivery and vacuum extraction. Results: The decision-to-delivery interval was 8.6±5.4 and 13.8±6.2 min for forceps and vacuum deliveries, respectively (P=0.0001). Conclusion: It appears that it is quicker to accomplish forceps delivery than vacuum extraction.     

The effect of sequential use of vacuum and forceps for assisted vaginal delivery on neonatal and maternal outcomes

OBJECTIVE: To determine the risk of neonatal and maternal disease associated with the sequential use of vacuum and forceps compared with spontaneous vaginal delivery. STUDY DESIGN: Using Washington state birth certificate data linked to hospital discharge records, we compared 3741 vaginal deliveries by both vacuum and forceps, 3741 vacuum deliveries, and 3741 forceps deliveries to 11,223 spontaneous vaginal deliveries. RESULTS: Compared with spontaneous vaginal deliveries, deliveries by sequential use of vacuum and forceps had significantly higher rates of intracranial hemorrhage (relative risk [RR], 3.9; 95% confidence interval [CI], 1.5 to 10.1), brachial plexus (RR, 3.2; 95% CI, 1.6 to 6.4), facial nerve injury (RR, 13.3; 95% CI, 4.7 to 37.7), seizure (RR, 13.7; 95% CI, 2.1 to 88.0), depressed 5-minute Apgar score (RR, 3.0; 95% CI, 2.2 to 4.0), assisted ventilation (RR, 4.8; 95% CI, 2.1 to 11.0), fourth-degree (RR, 11.4; 95% CI, 6.4 to 20.1 among multiparous women) and other lacerations, hematoma (RR, 6.2; 95% CI, 2.1 to 18.1 among multiparous women), and postpartum hemorrhage (RR, 1.6; 95% CI, 1.3 to 2.0). The relative risk of sequential vacuum and forceps use was greater than the sum of the individual relative risks of each instrument for intracranial hemorrhage, facial nerve injury, seizure, hematoma, and perineal and vaginal lacerations. CONCLUSION: Sequential use of vacuum and forceps is associated with increased risk of both neonatal and maternal injury.     

Residents’ Confidence in Performing Robotic Hysterectomy in Obstetrics and Gynecologic Training Programs

Study ObjectiveTo compare residents’ perceptions of readiness to perform robotic-assisted laparoscopic hysterectomy with the perceptions of residency program directors in obstetrics and gynecology programs throughout the United States.DesignA survey was administered to all residents taking the 2019 Council on Resident Education in Obstetrics and Gynecology Exam and concurrently to program directors in all Accreditation Council for Graduate Medical Education–accredited training programs.SettingThe survey was designed to assess resident confidence to perform robotic hysterectomies by the time of graduation.PatientsNo patients were included in the study.InterventionsThe only intervention was administration of the survey.Measurements and Main ResultsDe-identified survey data were analyzed using chi-squared and Fisher's exact tests. A total of 5473 resident respondents and 241 residency program directors were included in the study. Fifty-two percent of graduating residents reported that they felt they were given surgical autonomy to perform robotic hysterectomies, and 53.7% reported that they could perform one independently (if it was an “emergency” and they had to). By the time of graduation, only 59% of residents reported confidence performing a robotic hysterectomy, and only 56% reported they felt that it would be an important procedure for their future career. Program directors were significantly more likely to report that their residents were given autonomy to perform robotic hysterectomy by graduation (61.0% [95% confidence interval (CI), 54.3–67.3]), could perform a robotic hysterectomy independently (60.9% [95% CI, 53.9–67.6]), or could perform a robotic hysterectomy by graduation (70.2% [95% CI, 63.5–76.3]) than residents themselves (38.6% [95% CI, 37.2–40.0], 22.8% [95% CI, 21.6–24.0], 62.6% [95% CI, 61.2–64.0], respectively).ConclusionAt the time of graduation, residents’ confidence in performing robotic hysterectomy independently is lower than their confidence in performing all other approaches to hysterectomy.     

Effects of providing hospital-based doulas in health maintenance organization hospitals

OBJECTIVE: To evaluate whether providing doulas during hospital-based labor affects mode of delivery, epidural use, breast-feeding, and postpartum perceptions of the birth, self-esteem, and depression. METHODS: This was a randomized study of nullipara enrollees in a group-model health maintenance organization who delivered in one of three health maintenance organization-managed hospitals; 149 had doulas, and 165 had usual care. Study data were obtained from the mothers' medical charts, study intake forms, and phone interviews conducted 4-6 weeks postpartum. RESULTS: Women who had doulas had significantly less epidural use (54.4% versus 66.1%, P < .05) than women in the usual-care group. They also were significantly (P < .05) more likely to rate the birth experience as good (82.5% versus 67.4%), to feel they coped very well with labor (46.8% versus 28.3%), and to feel labor had a very positive effect on their feelings as women (58.0% versus 43.7%) and perception of their bodies' strength and performance (58.0% versus 41.0%). The two groups did not differ significantly in rates of cesarean, vaginal, forceps, or vacuum delivery, oxytocin administration; or breast-feeding, nor did they differ on the postpartum depression or self-esteem measures. CONCLUSION: For this population and setting, labor support from doulas had a desirable effect on epidural use and women's perceptions of birth, but did not alter need for operative deliveries.     

Perceived proficiency in endoscopic techniques among senior obstetrics and gynecology residents

STUDY OBJECTIVES: To assess current training methods in laparoscopic surgery employed in United States obstetrics and gynecology residency programs, level of proficiency in various minimally invasive surgery procedures amongst senior obstetrics and gynecology residents, and ways in which training in minimally invasive surgery can be improved. DESIGN: Survey (Canadian Task Force classification III). SETTING: Accredited obstetrics and gynecology programs in the United States. SUBJECTS: All fourth-year residents in accredited obstetrics and gynecology programs in the United States. INTERVENTION: Residents received a survey regarding their perceived proficiency performing various laparoscopic procedures and the type of training they received in these techniques. MEASUREMENTS AND MAIN RESULTS: Responses were received from 133 programs (52.4%) and 295 residents (26.8%). Of these, 67% of residents thought emphasis on laparoscopic surgery training should be increased or greatly increased; 87% thought laparoscopic skills were important for building a successful practice. Formal teaching methods were clearly associated with improved perception of proficiency, and those with higher perception of proficiency expected to perform more laparoscopic procedures after graduation. Residents lacked perceived competency in most advanced laparoscopic procedures. CONCLUSION: Residents seem to benefit significantly from a formal curriculum in minimally invasive surgery, but they do not feel competent performing some advanced procedures on graduation. In our opinion, more emphasis should be placed on training in laparoscopic surgery in United States obstetrics and gynecology programs.     

Fetal and maternal effects of forceps and vacuum extraction

Summary. Between 1976 and 1984, 223 forceps deliveries were compared with the next vacuum extraction that occurred in the labour ward. The groups did not differ in gestational age, parity, presentation and station of fetal head at start of the delivery, infant birthweights, or the indication for the procedure. Of the forceps deliveries, 66% were performed by a specialist, compared with only 16% of the vacuum extractions. Maternal complications were equally common in both groups. Severe birth canal trauma occurred in 7% of each group. Low 1-min Apgar scores (<7) were found significantly (P<0.0l) more often in the vacuum extraction group (36 infants) than in the forceps group (17 infants).Cephalohaematomas and scalp lesions, neonatal jaundice and clavicular fracture were all significantly less common after forceps than after vacuum extraction. One infant in the vacuum group had a cranial fracture.     

Is the Vacuum Extractor Really the Instrument of First Choice?

This study was a retrospective analysis of the pattern of usage of both the forceps and vacuum extractor as well as the neonatal outcome on all the instrumental deliveries conducted in 1995 at the Kandang Kerbau Hospital, Singapore. There were a total of 927 forceps deliveries and 495 vacuum extractions but neonatal data was available for only 481 forceps and 255 vacuum extractor babies. (There were 2 neonatal units which accepted admissions on alternate days; all of the data were collected from 1 of the units only). Demographic data were comparable in most aspects except that vacuum deliveries were significantly associated with higher parity and shorter labours. There was a trend towards using the vacuum extractor in less difficult cases. Almost all the instrumental deliveries were conducted by specialists. Birth trauma was significantly more likely to occur with the vacuum extractor. Almost all the deliveries were conducted with similar expertise in both groups, yet the use of the vacuum extractor resulted in more birth trauma even in the presence of 'easier' cases. This may suggest an inherent risk in using the vacuum extractor.     

Use of obstetric forceps in Finland today--experience at Vaasa Central Hospital 1984-1998.

BACKGROUND: Forceps delivery has become rare in Finland since the introduction of the vacuum extractor. Our aim was to survey the number of forceps deliveries in Finland and analyze our own material of 130 forceps deliveries during a 15-year period between 1984 and 1998. During this period there were 17,887 deliveries at Vaasa Central Hospital. METHODS: A retrospective study of 130 forceps deliveries and 11 trial forceps cases, which subsequently resulted in a cesarean section. RESULTS: There was no maternal or neonatal mortality. In 39 cases a cesarean section could be avoided by use of forceps after a failed vacuum extraction. Only in one case was maternal morbidity regarded as serious. There was no serious neonatal morbidity. Anal sphincter ruptures occurred in three cases (2.3%). All the women in the trial forceps group were nulliparous, in 73% of these the fetus was in a persistent occipito-posterior position. Failed vacuum extraction and trial forceps did not significantly influence neonatal outcome. CONCLUSIONS: Forceps delivery appears to be a safe alternative in our setting.     

Cohort study of maternal and neonatal morbidity in relation to use of episiotomy at instrumental vaginal delivery

OBJECTIVE: The aim of this study was to investigate the maternal and neonatal morbidity related to use of episiotomy for vacuum and forceps deliveries. DESIGN: Retrospective population-based cohort study. SETTING: Dundee, Scotland. POPULATION: Two thousand one hundred and fifty three women who experienced an instrumental vaginal delivery between January 1998 and December 2002. METHODS: Univariate and multivariate logistic regression analyses were performed comparing deliveries with and without the use of episiotomy. MAIN OUTCOME MEASURES: Extensive perineal tears (third and fourth degree) and shoulder dystocia. RESULTS: Two hundred and forty-one (11%) of the 2153 women who underwent instrumental vaginal deliveries did not receive an episiotomy. Vacuum delivery was associated with less use of episiotomy compared with forceps (odds ratio 0.10, 95% CI 0.07-0.14). Extensive perineal tears were more likely with use of episiotomy (7.5%vs 2.5%, adjusted OR 2.92, 95% CI 1.27-6.72) as was neonatal trauma (6.0%vs 1.7%, adjusted OR 2.62, 95% CI 1.05-6.54). Use of episiotomy did not reduce the risk of shoulder dystocia (6.9%vs 4.6%, adjusted OR 1.43, 95% CI 0.74-2.76). The findings were similar for delivery by vacuum and forceps. CONCLUSION: The use of episiotomy increased the risk of extensive perineal tears without a reduction in the risk of shoulder dystocia.     

Obstetric attending physician characteristics and their impact on vacuum and forceps delivery rates: University of California at San Francisco experience from 1977 to 1999

OBJECTIVE: The objective of our study was to determine the impact of obstetric attending physician characteristics (eg, region of previous residency training, sex, year of graduation from residency) on the rates of vacuum and forceps delivery at our institution. STUDY DESIGN: The analysis was based on 19,897 vaginal deliveries that were performed by 171 attending physicians and 160 resident physicians between 1977 and 1999 at the University of California at San Francisco Medical Center. Z -tests and multivariate logistic regression were performed on a perinatal database that contained standard obstetric variables. RESULTS: Male attending physicians had a higher percentage of forceps deliveries compared with female attending physicians (11.1% vs 6.6%; P <.001); female attending physicians had a higher percentage of vacuum deliveries compared with male attending physicians (9.8% vs 5.1%; P <.001). However, multivariate regression analysis revealed that only the year in which the procedure was performed affected both the forceps and vacuum delivery rates (P <.041). The region of previous residency training of the attending physician affected the vacuum delivery rate (P <.0001) but not the forceps delivery rate (P >.06) in multivariate logistic regression analysis. Factors such as the sex of the obstetric attending physician, the sex of the resident, and the year of graduation from residency for the obstetric attending physician did not have a significant impact on the forceps or vacuum delivery rates (all P >.05). CONCLUSION: Our study is the first to report that the apparent gender differences in forceps and vacuum delivery rates among obstetric attending physicians was due to the year in which the procedure was performed and not due to sex per se. We also found that the region of previous residency training for the obstetric attending physician significantly influenced the vacuum delivery rate.     

Survey of obstetric forceps training in North America in 1981

In April, 1983, a questionnaire was sent to all 144 United States and Canadian members of the Association of Professors of Gynecology and Obstetrics to survey residency training and current use of obstetric forceps in 1981. One hundred five programs (73%), responsible for at least 283,000 births in 1981, were subsequently analyzed. All training programs used outlet forceps and all programs but one used midforceps for delivery. Hospitals with high cesarean birth rates did not perform significantly fewer midforceps operations. Hospitals with high midforceps rates did not also have high outlet forceps rates nor did these high rates closely reflect the personal attitude to obstetric forceps of the director of the obstetric training program. Simpson's forceps were most commonly used for outlet forceps and occipitoanterior midforceps operations, whereas Kielland's forceps were selected by 76% of programs for rotational midcavity deliveries. Staff obstetricians were the primary instructors of forceps technique in the delivery room in only 50% of United States programs; all Canadian respondents reported the staff obstetrician as the principal educator in obstetric residency forceps training.     

Soft forceps.

OBJECTIVE: The risk of maternal and fetal trauma and, chiefly, the fear of law suits, have contributed to a significant decline in rates of forceps-assisted deliveries and an increase in rates of cesarean sections, especially in the United States. Our experience with gas-sterilized forceps blades covered with a soft rubber coating--the "soft" forceps--is described. METHOD: Ninety-six women who required a forceps-assisted delivery for standard indications were randomly allocated to 2 groups. There were 51 women in the regular forceps group and 45 women in the soft forceps group. Low forceps delivery with a Simpson instrument was used in all cases. The groups were compared for fetal injury. RESULTS: The rates of severe facial abrasion and minimal marking were 4.1% and 61%, respectively, in the regular forceps group and 1.9% and 34% in the soft forceps group. CONCLUSION: The soft forceps may reduce the rates of neonatal facial abrasion and skin bruises. The forceps should be further perfected, as well as vacuum extractors; they should both continue to be part of the obstetrician's armamentarium.     

Immediate maternal and neonatal effects of forceps and vacuum-assisted deliveries

OBJECTIVE: To estimate the differences in immediate maternal and neonatal effects of forceps and vacuum-assisted deliveries. METHODS: We conducted a medical record review of all forceps and vacuum-assisted deliveries that occurred from January 1, 1998, to August 30, 1999, at Winthrop-University Hospital. Maternal demographics and delivery characteristics were recorded. Maternal outcomes, such as use of episiotomy and presence of lacerations, were studied. Neonatal outcomes evaluated were Apgar scores, neonatal intensive care unit admissions, cephalohematomas, instrument marks and bruising, and caput and molding. RESULTS: Of 508 operative vaginal deliveries, 200 were forceps and 308 were vacuum assisted. Forceps were used more often than vacuum for prolonged second stage of labor (P =.001). There was a higher rate of epidural (P =.02) and pudendal (P <.001) anesthesia, episiotomies (P =.01), maternal third- and fourth-degree perineal (P <.001) and vaginal lacerations (P =.004) with the use of forceps, whereas periurethral lacerations were more common in vacuum-assisted (P =.026) deliveries. More instrument marks and bruising (P <.001) were found in the neonates delivered by forceps, whereas there was a greater incidence of cephalohematomas (P =.03) and caput and molding (P <.001) in the neonates delivered with vacuum. Multivariable logistic regression analysis showed that forceps use was associated with an increase in major perineal and vaginal tears (odds ratio [OR] 1.85; 95% confidence interval [CI] 1.27, 2.69; P =.001), an increase in instrument marks and bruising (OR 4.63; 95% CI 2.90, 7.41; P <.001) and a decrease in cephalohematomas (OR 0.49; 95% CI 0.29, 0.83; P =.007) compared with the vacuum. CONCLUSIONS: Maternal injuries are more common with the use of forceps. Neonates delivered with forceps have more facial injuries, whereas neonates delivered with vacuum have more cephalohematomas. LEVEL OF EVIDENCE: II-3     

Failed individual and sequential instrumental vaginal delivery: contributing risk factors and maternal-neonatal complications

BACKGROUND: To identify the risk factors for failed instrumental vaginal delivery, and to compare maternal and neonatal morbidity associated with failed individual and sequential instruments used. DESIGN: A retrospective case-control study. METHODS: From January 1995 to June 2001, there were 39 508 live births at >37 weeks' gestation of which 2628 (6.7%) instrumental vaginal deliveries were performed, 1723 (4.4%) were vacuum extractions and 905 (2.3%) were forceps. A total of 155/2628 (5.9%) patients who had failed instrumental delivery were matched with 204 patients who had successful instrumental delivery. The patients were divided into five groups. Group I (n = 129) had failed vacuum extraction, group II (n = 13) failed forceps, group III (n = 13) failed both (i.e. failed attempt at both instruments sequentially), group IV (n = 138) had successful vacuum extraction and group V (n = 66) successful forceps. RESULTS: The failure rate for vacuum extractions 129/1723 (7.5%) was significantly higher than that for forceps 13/905 (1.4%) [odds ratio (OR) = 5.6, 95% CI 3-10.3]. There were no significant differences in all maternal complications (25.5% vs. 26.6%) between vacuum (groups I and IV) and forceps (groups II and V) assisted deliveries. There were more maternal complications in group III (46.2%) than in groups I (35.7%), II (23.1%) and V (27.3%) that did not reach statistical significance but were significantly higher than in group IV (15.9%, OR = 4.5, 95% CI 1.2-16.9). There was a significantly higher rate of all fetal complications in group III [11/13 (84.6%)] than in groups I [69/129 (53.5%)], II [7/13 (53.8%)], IV [35/138 (25.4%)] and V [22/66 (33.3%)] (OR = 4.8, 95% CI 0.9-19.9). CONCLUSIONS: Applying the instrument at < or =0 fetal station, nulliparous women, history of previous cesarean section and fetal head other than occipitoanterior position were risk factors for failed instrumental delivery. Sequential use of instrumental delivery carries a significantly higher neonatal morbidity than when a single instrument is used.