Field studies on inhibitory influence of skin pressure exerted by a body compensatory brassiere on the amount of feces

Effects of skin pressure from compression legwear on resting salivary cortisol and urinary catecholamines excretion in women

BACKGROUND

The benefits of compression legwear (CL) have been demonstrated in the improvement of vascular function and venous return of the lower extremities, but their effect on autonomic nervous system (ANS) activities and human stress response remain controversial.

OBJECTIVE

To investigate the possible effects of CLs on ANS activities and in inducing stress on the human body.

MATERIALS AND METHODS

Resting salivary cortisol and urinary catecholamine (adrenaline and noradrenaline) excretions were examined in 12 healthy women. The effects of different skin pressure levels exerted by CL were studied by conducting a 4-hour prolonged standing and sitting wear trial with intermittent sampling of the aforementioned biochemical parameters.

RESULTS

No statistically significant differences in resting salivary cortisol and urinary catecholamines were found between control and different clothing pressure conditions (light, mild, moderate, and strong), although the secretion of salivary cortisol (SSC) showed a significant decrease during the 180 minutes of the testing period that was maintained up to 10 minutes after the CL was removed for the studied pressure conditions. Urinary excretion of adrenaline and noradrenaline decreased with increasing pressure levels and was lower in response to higher clothing pressure when tested in the afternoon.

CONCLUSION

Constant pressure exerted by CL did not cause any stimulation of the sympathetic nervous system. The prolonged wearing of CL while standing or sitting did not induce any stress on the human body, suggesting that CL can be safely used in the treatment of patients with venous disorders of the lower extremities.

Shoulder Strain Caused by Mammary Prostheses - an Experimental Comparison of Different Forms of Epicutaneous Prostheses

SUMMARY: BACKGROUND: In the case of breast cancer, removal of the breast can not always be avoided. The use of external prostheses, however, can lead to discomfort for the patients through shoulder pain and muscle hardening. It can be assumed that this is caused by strain on the shoulder due to the weight of the prosthesis. This study was to identify the possibilities to objectively assess patients' complaints associated with this type of supportive treatment. SUBJECTS AND METHODS: In this pilot study, varying types and sizes of prostheses were tested on male subjects, quasi as if they were women amputated on both sides. The strain caused by the prostheses and distributed via the straps of the brassiere were measured by electronic pressure sensors and statistically evaluated. RESULTS: Weight-reduced prostheses significantly decreased the resulting average pressure amplitude (p < 0.01) compared to normal weight prostheses. Furthermore, heavy contact prostheses, which are attached to the chest wall, have a significant advantage (p < 0.01) compared to normal prostheses of the same size. Moreover, evidence was found that contact prostheses have advantages with respect to pressure on the shoulder during physical exercise, e.g. running. CONCLUSION: Currently, weight-reduced contact prostheses present optimal treatment after breast amputation.

Effects of clothing pressure caused by different types of brassieres on autonomic nervous system activity evaluated by heart rate variability power spectral analysis

The present study was designed to investigate the effects of clothing skin pressures exerted by two different types of brassieres (a conventional higher skin-pressured brassiere and a newly devised low skin-pressured brassiere) on the autonomic nervous system (ANS) activity. Six healthy young women (22.8 +/- 1.4 yrs.) with regular menstrual cycles participated in this study. The ANS activities were assessed by means of heart rate variability power spectral analysis. The skin pressures exerted by the brassieres were measured with an air-pack type contact surface pressure sensor at five different points. The total amount of clothing pressure, and the pressures at the center and the side regions of the brassieres were significantly greater in the high than in the low skin-pressured brassiere (Total 9816.1 +/- 269.0 vs. 6436.8 +/- 252.4 Pa, P < 0.01; Center 2212.1 +/- 336.3 vs. 353.8 +/- 85.8 Pa, P < 0.01; Side 2556.8 +/- 316.1 vs. 1747.2 +/- 199.2 Pa, P < 0.05). Concerning the ANS activity, the Total power, and the very low frequency (VLF) and the high frequency (HF) components were significantly decreased in the high skin-pressured brassiere than those in the low skin-pressured brassiere (Total 531.6 +/- 57.3 vs. 770.5 +/- 54.2 ms2, P < 0.01; VLF 60.7 +/- 14.6 vs. 179.2 +/- 38.1 ms2, P < 0.05; HF 209.5 +/- 33.2 vs. 283.2 +/- 61.5 ms2, P < 0.01). Our data indicate that the higher clothing pressures exerted by a conventional brassiere have a significant negative impact on the ANS activity, which is predominantly attributable to the significant decrease in the parasympathetic as well as the thermoregulatory sympathetic nerve activities. Since the ANS activity plays an important role in modulating the internal environment in the human body, excess clothing pressures caused by constricting types of foundation garments on the body would consequently undermine women's health.