Hysteroscopic Tissue Removal Systems: A Randomized In Vitro Comparison.

STUDY OBJECTIVE: To compare polyp resection time and myoma resection rate using 2 hysteroscopic tissue removal systems. DESIGN: Prospective randomized in vitro trial (Canadian Task Force classification I). SETTING: Clinical skills laboratory of a non-university teaching hospital. SAMPLES: Polyp surrogate and myoma tissue. INTERVENTIONS: Hysteroscopic tissue removal with the TRUCLEAR system, using the TRUCLEAR INCISOR 2.9 (TI), TRUCLEAR INCISOR Plus (TIP), or TRUCLEAR ULTRA Plus (TUP) device, and the MyoSure system, using the MyoSure Lite (ML), MyoSure Classic (MC), or MyoSure XL (MXL) device. MEASUREMENTS AND MAIN RESULTS: Forty-two fragments of umbilical cord weighing 5 g, as a surrogate for polyps, were randomly allocated to 4 types of devices (TI, TIP, ML, and MC). Three consecutive fragments were removed using a single device. In addition, 18 pieces of myoma tissue were divided into 2 equal parts and randomly allocated to 2 types of devices (TUP and MXL). A new device was used for each fragment. Each type of device was tested at 2 vacuum settings. When removing 1 polyp, the TIP (median time, 2:33 minutes [interquartile range (IQR), 1:32-3:27 minutes]), the MC (median time, 3:15 minutes [IQR, 2:42-3:42 minutes]), and the ML (median time, 3:00 minutes [IQR, 2:16-3:25 minutes]) performed significantly faster than the TI (median time, 14:09 minutes [IQR, 13:44-14:36 minutes]), by 84%, 78%, and 82% respectively (p < .001). The TIP performed 80% faster than the TI (median time, 2:27 minutes [IQR, 1:45-2:46 minutes] vs 10:37 minutes [IQR, 8:38-13:44 minutes]; p < .001) when removing a second polyp. For removal of a third polyp, the TIP performed significantly faster (median time, 2:22 minutes [IQR, 1:32-3:07 minutes]) than the TI (median time, 8:35 minutes [IQR, 7:37-9:03 minutes]) and the ML (median time, 10:02 minutes [IQR, 9:51-10:18 minutes]), by 74% and 78%, respectively (p < .001). The performance of the ML decreased (p < .001) during removal of 3 consecutive tissue samples. For myoma tissue, the estimated mean resection rate of the TUP (2.96 g/min [95% confidence interval (CI), 2.32-3.77 g/min]) was 24% (95% CI 0.2%-52.4%) higher than the mean resection rate of the MXL (2.39 g/min [95% CI 1.87-3.05 g/min]; p = .048). The resection rate of the MXL adjusted for vacuum setting declined by 3% per unit increase in myoma volume (95% CI, -0.6% to -5.7%; p = .02). For the TUP, no linear association was found (0.4%; 95% CI, -2.1% to 3.0%; p = .72). CONCLUSION: In vitro comparison of the removal of surrogate polyps showed that although the larger TIP, MC, and ML devices were significantly faster than the TI for removal of 1 polyp, only the TIP was consistently faster than the TI for consecutive removal of polyps. The performance of the ML decreased significantly during removal of 3 consecutive tissue samples, making it slower than the TIP with a similar window size in the third run. For removal of myoma tissue, the resection rate of the TUP was significantly higher than that of the MXL, and the resection rate of the MXL decreased with increasing myoma volume. In vitro testing can provide useful information on the time and rate of hysteroscopic tissue removal.

Care by Midwives, Obstetricians, and Dietitians for Pregnant Women Following a Strict Plant-Based Diet: A Cross-Sectional Study.

With an growing number of people on a strict plant-based diet, its potential effect on pregnancy and lactation becomes increasingly important. It is, however, unclear how obstetric caregivers currently handle and think about a strict plant-based diet in pregnancy. The aim of the study was therefore to evaluate the self-reported knowledge and advice given by Dutch obstetric caregivers and dietitians when treating pregnant women on a strict plant-based diet. A cross-sectional study was performed by sending an online survey to Dutch midwife practices, obstetricians, and dietitian practices. Descriptive statistics are reported. A total of 121 midwives, 179 obstetricians, and 111 dietitians participated in this study. The majority of midwives (80.2%) and obstetricians (93.9%) considered a strict plant-based diet to be a significant risk factor for nutrient deficiency during pregnancy. Maternal dietary preferences, including a potential strict plant-based diet, were discussed at the first prenatal appointment by 59.5% of midwives and 24.1% of obstetricians. A self-reported lack of knowledge concerning the strict plant-based diet was mentioned by 66.1% of midwives and 75.4% of obstetricians. Obstetric caregivers mostly considered the identification of this dietary habit and subsequent referral to a dietitian or a reliable website as optimal care for pregnant women on the strict plant-based diet. However, only 38.7% of dietitians indicated to have sufficient knowledge to counsel these women. Although obstetric caregivers thought that a strict plant-based diet in pregnancy may lead to increased risks of nutritional deficiencies, the majority report to have insufficient knowledge to provide adequate advice. Only a minority referred these women to dietitians, of whom a minority indicated to have adequate knowledge on this specific diet. These results suggest that current care is suboptimal for an increasing number of pregnant women. Women on a strict plant-based diet could benefit from increased knowledge about this topic among obstetric caregivers and dietitians, as well as from clear guidelines regarding this diet during pregnancy.