Evaluation of Computer-aided Strategies for Teaching Medical Students Prenatal Ultrasound Diagnostic Skills.

OBJECTIVE: To evaluate whether computer-based learning (CBL) improves newly acquired knowledge and is an effective strategy for teaching prenatal ultrasound diagnostic skills to third-year medical students when compared with instruction by traditional paper-based methods (PBM). STUDY DESIGN: We conducted a randomized, prospective study involving volunteer junior (3(rd) year) medical students consecutively rotating through the Obstetrics and Gynecology clerkship during six months of the 2005-2006 academic year. The students were randomly assigned to permuted blocks and divided into two groups. Half of the participants received instruction in prenatal ultrasound diagnostics using an interactive CBL program; the other half received instruction using equivalent material by the traditional PBM. Outcomes were evaluated by comparing changes in pre-tutorial and post instruction examination scores. RESULTS: All 36 potential participants (100%) completed the study curriculum. Students were divided equally between the CBL (n = 18) and PBM (n = 18) groups. Pre-tutorial exam scores (mean+/-s.d.) were 44%+/-11.1% for the CBL group and 44%+/-10.8% for the PBL cohort, indicating no statistically significant differences (p>0.05) between the two groups. After instruction, post-tutorial exam scores (mean+/-s.d.) were increased from the pre-tutorial scores, 74%+/-11% and 67%+/-12%, for students in the CBL and the PBM groups, respectively. The improvement in post-tutorial exam scores from the pre-test scores was considered significant (p<0.05). When post-test scores for the tutorial groups were compared, the CBL subjects achieved a score that was, on average, 7 percentage points higher than their PBM counterparts, a statistically significant difference (p < 0.05). CONCLUSION: Instruction by either CBL or PBM strategies is associated with improvements in newly acquired knowledge as reflected by increased post-tutorial examination scores. Students that received CBL had significantlyhigher post-tutorial exam scores than those in the PBM group, indicating that CBL is an effective instruction strategy in this setting.

Prosthetic heart valves and arrhythmias in pregnancy.

The majority of women with bioprosthetic valves do not require anticoagulation during pregnancy. In women with mechanical valves, a detailed discussion of the advantages and disadvantages of the three anticoagulant options (warfarin, unfractionated heparin and low molecular weight heparin) is indicated. The majority of women with arrhythmias during pregnancy have a benign increased rate of atrial or ventricular premature beats. Those women who are hemodynamically stable can be reassured and do not usually require treatment. Women with more ominous arrhythmias should be managed in collaboration with a cardiologist, usually using the same agents that would be chosen in the non-pregnant patient, including electrical cardioversion when necessary. This is the fifth and final article in a series reviewing in detail the assessment and management of specific cardiac disorders in pregnancy.

Ischemic heart disease and cardiomyopathy in pregnancy.

Ischemic heart disease and cardiomyopathy in pregnancy are both rare. Therefore, a high level of suspicion is required by the obstetric caregiver when women complain of the often vague symptoms that are indicative of these conditions. Early diagnosis, consultation with a cardiologist, and aggressive therapy are the keys to reducing morbidity and mortality. Women who suffer myocardial infarction in pregnancy should be stabilized, and delivery within the first two weeks post event should be avoided if possible. Women who completely recover from peripartum cardiomyopathy can be reassured when considering future pregnancies. Pregnancy should be considered contraindicated in women with Class H diabetes, and efforts should be made to establish reliable contraception. This is the fourth in a series of five articles reviewing in detail the assessment and management of specific cardiac disorders in pregnancy.

Acquired heart disease in pregnancy.

The incidence of rheumatic heart disease in most industrialized countries is decreasing. Those women who have regurgitant lesions will commonly experience an improvement in symptoms, and therapy is required only in the most severe cases. Women with mild to moderate stenotic lesions can usually expect a good outcome to pregnancy, but women with severe stenotic lesions require close monitoring by both their obstetricians and their cardiologists, especially during the third trimester, labour and delivery, and the early postpartum period. This is the third in a series of five articles reviewing in detail the assessment and management of specific cardiac disorders in pregnancy.

Congenital heart disease in pregnancy.

Congenital heart disease has become more prevalent in women of childbearing age and represents about 75% of the heart disease seen in pregnancy. Close monitoring by both obstetricians and cardiologists is advisable for women with complex heart disease, and pregnancy should still be considered contraindicated in several types of congenital heart disease. Women should also be advised of the risk that their offspring may be affected. Women at increased risk for a cardiac event in pregnancy include those with a prior cardiac event or arrhythmia, NYHA functional class > II or cyanosis, left heart obstruction, and systemic ventricular dysfunction. In the absence of adverse predictors, however, women with congenital heart disease can be assured that pregnancy does not pose a significant risk to their health.

Assessment and management of cardiac disease in pregnancy.

Approximately 1% of pregnancies are affected by congenital or acquired cardiac disease. The obstetric care provider requires an understanding of the expected cardiorespiratory adaptations to pregnancy in order to anticipate when and how the cardiac patient may decompensate. Although the majority of women with cardiac disease in pregnancy can expect a positive outcome, women should be evaluated for predictors of poor perinatal outcome to aid in determining the appropriate location for and surveillance in labour. Women affected with congenital heart disease require counselling about the risk of recurrence in their offspring. The discussion of contraceptive needs for the woman with cardiac disease is critical in the appropriate planning of her family.

Maternal serum cytokines in preterm premature rupture of membranes.

OBJECTIVE: To estimate whether maternal serum interleukin (IL)-6 or granulocyte colony-stimulating factor (G-CSF) obtained daily are elevated in women with preterm premature rupture of membranes who develop funisitis. METHODS: Daily blood samples were obtained from women with preterm premature rupture of membranes and analyzed for IL-6 and G-CSF by enzyme-linked immunosorbent assay. Funisitis was determined by placental examination. Observations were stratified based on the presence or absence of funisitis and analyzed. Proportional hazards models were used to evaluate time-to-delivery on the basis of diagnostic IL-6 and G-CSF levels, determined by receiver operating characteristic curve analysis. RESULTS: Of the 107 patients available for analysis, 54 (50%) had evidence of funisitis after delivery. Patients with funisitis were more likely to deliver at an earlier gestational age (28.5 weeks compared with 31.5 weeks, P<.001) and have Medicaid insurance (57% compared with 39%, P=.04). Serum IL-6 and G-CSF were elevated 24 to 48 hours before delivery in women with preterm premature rupture of membranes with funisitis compared with those without funisitis (IL-6, 7.5 compared with 2.8 pg/mL, P<.001; G-CSF, 121.7 compared with 56.9 pg/mL, P=.002). Using values identified by the receiver operating characteristic curve, elevated serum IL-6 in the interval 24-72 hours before delivery was significantly associated with funisitis (P<.03), even after controlling for gestational age and insurance status. CONCLUSION: Maternal serum IL-6 and G-CSF appear to be biomarkers in the identification of women with preterm premature rupture of membranes likely to develop funisitis. LEVEL OF EVIDENCE: II.

Post-call cognitive function and satisfaction in medical students on different call schedules: a prospective observational pilot study.

OBJECTIVE: The purpose of this study was to evaluate the effects of 2 different call schedules on post-call cognitive function and satisfaction. STUDY DESIGN: This is a prospective observational pilot study of 20 third-year medical students. A computerized cognitive function test was administered to students with call every fourth night or a week of 12-hour "night float" shifts. Questionnaires were completed to assess satisfaction on different call schedules. RESULTS: There was no significant difference in cognitive functioning scores for students on either call schedule. Responses on questionnaires indicate that night float allows students to feel more alert for clinical duties (P = .03). CONCLUSION: There is no significant impact of sleep deprivation on cognitive scores; however, night float allows students to feel subjectively more alert for clinical duties.

Measurement of endometrial stripe thickness by obstetrics and gynecology residents.

OBJECTIVE: How well do obstetrics and gynecology residents measure the endometrial stripe by transvaginal sonography? STUDY DESIGN: Three obstetrics and gynecology residents at the University of Texas Medical Branch from each year level were tested for their ability to perform endometrial stripe measurements. Measurements of endometrial stripe thickness within 1 mm of the reference value that was obtained by an expert sonographer were deemed to be correct. RESULTS: Residents correctly measured the endometrial stripe in 14 of 24 cases (58%). Postgraduate year-4 residents correctly measured endometrial stripe thickness in 5 of 6 cases (83%); lower level residents were correct in 9 of 18 cases (50%). The most common error that was noted was an incorrect image plane in 25 of 47 attempts (53%). Fewer errors were committed by upper level as compared with lower level residents (P < .05). CONCLUSION: By the end of residency, residents can accurately measure the endometrial stripe using transvaginal sonography. Emphasis should be placed on the improvement of the measurement skills.

An evaluation of trends in obstetrics and gynecology clerkships in the United States and Canada.

OBJECTIVE: The purpose of this study was to provide an updated profile of clerkship directors and third-year clerkships for Departments of Obstetrics and Gynecology at US and Canadian medical schools. STUDY DESIGN: All 142 accredited medical schools in the US and Canada were contacted to identify the individual(s) responsible for third-year medical education in Obstetrics and Gynecology. Additional clerkship sites (n=10) were identified using the Association of Professors in Gynecology and Obstetrics' (APGO) list of current members self-identified as clerkship directors. Written surveys were mailed to the individuals identified above. The survey included questions about demographic and academic profiles, 11 attitude statements, as well as potential interest in a national organization of clerkship directors under APGO and interest in the creation of web-based resources specifically for clerkship directors. RESULTS: One hundred twenty-three (81%) responses were received. Demographic and academic characteristics of clerkship directors were similar to those published 13 (1) and 6 (2) years ago, except that the proportion of female clerkship directors has steadily increased (20% in 1989 [1], 25% in 1994 [2], and 44% in 2000, P <.0001). Thirty-five percent of departments have a specialized division of medical education, and 21% of respondents stated that their affiliated medical school had a formal multidisciplinary women's health care curriculum. Eighty-nine percent of respondents felt that their job as clerkship director was personally fulfilling. Eighty- nine percent supported a national organization of clerkship directors under APGO and the majority supported other activities specific for clerkship directors, including web-based resources. CONCLUSION: The profiles of obstetrics and gynecology clerkships and clerkship directors in the US and Canada have remained relatively stable over the last 13 years. However, the proportion of female clerkship directors continues to increase. Interest in more organized activities specifically for clerkship directors and web-based resources is high.

Small-group discussion versus lecture format for third-year students in obstetrics and gynecology.

OBJECTIVE: To compare lecture and small-group discussion for third-year medical students in obstetrics and gynecology. METHODS: Over a 2-year period, 91 third-year medical students in the obstetrics and gynecology clerkships were given educational sessions on diabetes and hypertension in pregnancy by a single instructor, either in a traditional lecture format or in a small-group discussion. After the instructional sessions, students anonymously completed a 20-question multiple-choice examination on the covered topics. They also completed an evaluation form on the instructional format, using a 5-point Likert scale, ranging from 1 (strongly disagree) to 5 (strongly agree). At the completion of each clerkship, students repeated the same multiple-choice examination. RESULTS: There was a significantly higher level of enjoyment (median value 5 versus 4, P <.001) and sense of educational stimulation (median value 5 versus 4, P <.001) in the discussion group, and students in the discussion group were less desirous of the alternate instructional format than those in the lecture group (median value 2 versus 3, P <.001). However, there were no differences in the test scores, either immediately after the instructional sessions or at the end of the clerkships. There was a 90% power to detect a 15% difference in postinstructional test scores. CONCLUSION: Third-year medical students learning about hypertension and diabetes in pregnancy during their obstetrics and gynecology clerkship strongly preferred small-group discussions over traditional lectures. However, this preference did not lead to improved test scores on these subjects.