Women's bike seats: a pressing matter for competitive female cyclists

IntroductionThere are numerous genital complaints in women cyclists, including pain, numbness, and edema of pelvic floor structures. Debate ensues about the best saddle design for protection of the pelvic floor.AimTo investigate the relationships between saddle design, seat pressures, and genital nerve function in female, competitive cyclists.MethodsWe previously compared genital sensation in healthy, premenopausal, competitive women bicyclists and runners. The 48 cyclists from our original study comprise the study group in this subanalysis.Main Outcome MeasuresMain outcome measures were: (i) genital vibratory thresholds (VTs) determined using the Medoc Vibratory Sensation Analyzer 3000 and (ii) saddle pressures as determined using a specially designed map sensor.ResultsMore than half of the participants (54.8%) used traditional saddles, and the remainder (45.2%) rode with cut‐out saddles. On bivariate analysis, use of traditional saddles was associated with lower mean perineal saddle pressures (MPSP) than riding on cut‐out saddles. Peak perineal saddle pressures (PPSP) were also lower; however, the difference did not reach statistical significance. Saddle design did not affect mean or peak total saddle pressures (MTSP, PTSP). Saddle width was significantly associated with PPSP, MTSP, and PTSP but not with MPSP. Women riding cut‐out saddles had, on average, a 4 and 11 kPa increase in MPSP and PPSP, respectively, compared with women using traditional saddles (P = 0.008 and P = 0.010), after adjustment for other variables. Use of wider saddles was associated with lower PPSP and MTSP after adjustment. Although an inverse correlation was seen between saddle pressures and VTs on bivariate analysis, these differences were not significant after adjusting for age.ConclusionCut‐out and narrower saddles negatively affect saddle pressures in female cyclists. Effects of saddle design on pudendal nerve sensory function were not apparent in this cross‐sectional analysis. Longitudinal studies evaluating the long‐term effects of saddle pressure on the integrity of the pudendal nerve, pelvic floor, and sexual function are warranted. Guess MK, Partin SN, Schrader S, Lowe B, LaCombe J, Reutman S, Wang A, Toennis C, Melman A, Mikhail M, and Connell KA. Women's bike seats: A pressing matter for competitive female cyclists. J Sex Med 2011;8:3144–3153.     

Can classic metaphyseal lesions follow uncomplicated caesarean section?

BACKGROUND: Classic metaphyseal lesion (CML) is the term given to a fracture that most often occurs in the posteromedial aspect of the distal femur, proximal tibia, distal tibia, and proximal humerus in infants; this finding is strongly associated with non-accidental injury. OBJECTIVE: To demonstrate that the CML may occur following simple lower segment caesarean section (LSCS). MATERIALS AND METHODS: A review of 22 years of an obstetric practice that delivers 8,500 babies per year. RESULTS: We identified three neonates born by elective LSCS, each with distal femoral metaphyseal fractures on postpartum radiographs. All caesarean sections were elective and uncomplicated. External cephalic version was not employed preoperatively. Postpartum radiographs demonstrated a fracture of the distal femoral metaphysis in each neonate, typical of a CML. CONCLUSION: We propose that a CML can occur in the setting of a simple, elective and uncomplicated LSCS where no external cephalic version is employed.     

Preparing public health nurses for pandemic influenza through distance learning

As a global influenza pandemic appears imminent with the spread of avian influenza, the California Department of Health Services (CDHS) and the California Distance Learning Health Network (CDLHN) presented a live 90-min satellite broadcast and subsequent 2-hr small group problem-solving tabletop exercise to practice interventions needed to minimize the consequences of a pandemic event. Public health nurses (PHNs), managers, and other staff in laboratories, clinical care, veterinary medicine, environmental health, public information and safety, emergency management, and transportation down linked the program, broadcast by satellite from the CDHS Richmond Laboratory Campus, to view on-site locally. PHNs represented the professional category with the highest number of participants for those conducting the program outside of California. For those in California, PHNs represented the professional category with the second highest number of participants. Participants and distance-learning facilitators completed a training evaluation survey. Continuing education credits were provided by the Centers for Disease Control and Prevention to participants who completed the satellite broadcast evaluation. This distance-learning-by-satellite method of education paired with an activities-based tabletop exercise, and a focus on local rather than State-based responsibility, marks an innovative method of training PHNs and other staff in emergency preparedness response.     

Cd36 and molecular mechanisms of insulin resistance in the stroke-prone spontaneously hypertensive rat

Insulin resistance is of pathogenic importance in several common human disorders including type 2 diabetes, hypertension, obesity and hyperlipidemia, but the underlying mechanisms are unknown. The spontaneously hypertensive rat (SHR) is a model of these human insulin resistance syndromes. Quantitative trait loci (QTLs) for SHR defects in glucose and fatty acid metabolism, hypertriglyceridemia, and hypertension map to a single region on rat chromosome 4. Genetic analysis of an SHR derived from a National Institutes of Health colony led to the identification of a causative mutation in the SHR Cd36. We have investigated glucose and fatty acid metabolism in the stroke-prone SHR (SHRSP). We demonstrate defects in insulin action on 2-deoxy-D-glucose transport (SHRSP 3.3 +/- 1.5 vs. 21.0 +/- 7.4 pmol x min(-1) x [20 microl packed cells](-1), SHRSP vs. WKY, respectively, P = 0.01) and inhibition of catecholamine-stimulated lipolysis (P < 0.05 at all concentrations of insulin) in adipocytes isolated from SHRSP. In contrast, basal levels of catecholamine-stimulated nonesterified free fatty acid (NEFA) release and plasma levels of NEFA are similar in SHRSP and WKY. These results are in agreement with the data on the SHR.4 congenic strain, which suggested that the QTL containing Cd36 mutations accounted for the entire defect in basal catecholamine action but only for approximately 40% of the SHR defect in insulin action. In the SHR, both abnormalities appear consequent of defective Cd36 expression. Because Cd36 sequence and expression are apparently normal in SHRSP, it is likely that the molecular mechanism for defective insulin action in this strain is caused by a gene(s) different than Cd36.     

The association between greater continuity of care and timely measles-mumps-rubella vaccination

OBJECTIVES: This study assessed whether greater continuity of care is associated with timely administration of measles-mumps-rubella (MMR) vaccination. METHODS: We studied 11,233 patients continuously enrolled in Group Health Cooperative (GHC) from birth to 15 months. We used a preestablished index to quantify continuity of care based on the number of primary care providers in relation to the number of clinic visits. MMR vaccination status at 15 months was assessed with automated immunization data systems at GHC. RESULTS: In a logistic regression model, both medium continuity (odds ratio [OR] = 1.20, 95% confidence interval [CI] = 1.08, 1.33) and high continuity (OR = 1.36, 95% CI = 1.22, 1.52) were associated with increased likelihood of being immunized by 15 months compared with patients in the lowest tercile of continuity of care. CONCLUSION: Greater continuity of care is associated with more timely immunization.     

Lung bullae and pulmonary fibrosis associated with marijuana smoking

A 26‐year‐old man with a history of heavy marijuana and minimal tobacco use was found to have extensive bilateral lung bullae and interstitial fibrosis, heavily infiltrated by pigmented macrophages. These features can be associated with marijuana smoking. The differential diagnoses in this patient are also discussed.     

Illness representations among first-degree relatives of people with Alzheimer disease

The purpose of this study was to examine attitudes, beliefs, and experiences regarding Alzheimer disease (AD) among patients' first-degree relatives, a group that is at increased AD risk and often involved in health care decision-making for affected family members. Children and siblings (N = 203; age range, 30-92 years; 75% female) of people with AD completed a questionnaire (response rate, 90%) that assessed mental representations of AD, including knowledge, cause and treatment beliefs, distress, and perceived threat. In general, relatives were knowledgeable about AD, had an accurate sense of their disease risk, and endorsed etiologically significant factors as causes. Nonetheless, many participants held misconceptions about AD (e.g., most cases are hereditary) and what may be unrealistic expectations for future treatment developments. Levels of perceived distress and threat were generally high and associated with female gender and younger age. AD represented the foremost health concern of approximately one third of first-degree relatives. Health education efforts are needed to address misconceptions about AD genetics and to disseminate information about the availability of effective treatments. Further research on illness representations is needed to better understand coping and decision-making among those at risk for AD.