Coleman Tanner J, Hamad Nadia M, Shaw Janet M, Egger Marlene J, Hsu Yvonne, Hitchcock Robert, Jin Huifeng, Choi Chan K, Nygaard Ingrid E
Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA.
Int Urogynecol J. 2015 Jul;26(7):967-74. doi: 10.1007/s00192-014-2593-5. Epub 2014 Dec 20.
Walking speed and carrying technique affect intra-abdominal pressure (IAP) in women. In this study, we tested the feasibility of monitoring IAP outside the laboratory environment and compared IAP while study participants were (1) carrying 13.6 kg (similar to a 3-month old in car seat) in six different ways while walking 100 m; and (2) while walking 400 m at self-selected slow, normal, and fast paces.
Forty-six healthy women between 19 and 54 years completed the walking and lifting activities; the order for each was randomized. IAP was monitored with an intravaginal pressure transducer that wirelessly transmitted pressure data to a portable base station. We analyzed maximal peak IAP and area under the curve (AUC) IAP.
Monitoring IAP outside of the laboratory was feasible. Mean maximal IAP during walking increased as pace increased: 42.5 [standard deviation (SD) 10.2], 50.5 (10.9), and 62.0 (12.1) cmH2O for slow, medium, and fast speeds, respectively: p < 0.0001 by mixed-model analysis of variance (ANOVA). The corresponding AUC of IAP for walking decreased as pace increased. The awkward carry, side carry, and front carry activities each resulted in higher mean maximal IAP [65.8 (10.6), 67.7 (12.8), and 77.3 (13.1) cmH2O, respectively] than the carry-in-backpack activity [55.5 (11.4) cmH2O; p < 0.0001].
Subtle variations in walking speed or method of carrying a toddler-size load can produce significant changes in IAP. Whether these changes increase the risk of pelvic floor disorders is not yet clear. However, these data suggest that further inquiry into optimal methods and appliances to assist women in carrying may create a lower IAP profile.
步行速度和携带方式会影响女性的腹内压（IAP）。在本研究中，我们测试了在实验室外环境监测IAP的可行性，并比较了研究参与者在以下两种情况下的IAP：（1）以六种不同方式携带13.6千克重物（类似于坐在汽车座椅中的3个月大婴儿）行走100米；（2）以自行选择的慢、正常和快步伐行走400米。
46名年龄在19至54岁之间的健康女性完成了行走和提举活动；每项活动的顺序均随机安排。使用阴道内压力传感器监测IAP，该传感器将压力数据无线传输至便携式基站。我们分析了最大峰值IAP和IAP曲线下面积（AUC）。
在实验室外监测IAP是可行的。步行过程中的平均最大IAP随步伐加快而增加：慢、中、快速度下分别为42.5[标准差（SD）10.2]、50.5（10.9）和62.0（12.1）厘米水柱：通过混合模型方差分析（ANOVA），p< 0.0001。步行时IAP的相应AUC随步伐加快而降低。笨拙携带、侧面携带和正面携带活动导致的平均最大IAP[分别为65.8（10.6）、67.7（12.8）和77.3（13.1）厘米水柱]均高于背包携带活动[55.5（11.4）厘米水柱；p< 0.0001]。
步行速度或携带幼儿大小负荷方式的细微变化可导致IAP显著改变。这些变化是否会增加盆底功能障碍的风险尚不清楚。然而，这些数据表明，进一步探究协助女性携带物品的最佳方法和器具可能会降低IAP水平。
