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Results for “PLETHYSMOGRAPHY”

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PubMed1990

Venous muscle pump function during pregnancy. Assessment by ambulatory strain-gauge plethysmography.

The venous muscle pump function was quantitatively assessed through pregnancy weeks 16, 30, 38 and 3 months (week 53) following delivery, in 24 pregnant women who completed a normal pregnancy. A statistically significant increase was found in the mean venous reflux (P less than 0.01), which was restored to initial values postpartum. Expelled calf volume remained stable throughout pregnancy but increased following delivery. Venous outflow from the legs was significantly reduced in the third trimester. Subjective symptoms of venous insufficiency increased through pregnancy, but, these symptoms had virtually disappeared post partum, corresponding to the muscle pump normalization. No statistical correlation was found between venous muscle pump values and changes in hormone concentrations of estradiol, estriol and progesterone. It is suggested that venous insufficiency development in pregnancy is caused primarily by mechanical obstruction, or hormonal influence other than that of estradiol, estriol or progesterone. 17% (4.7-37%) of the women with a normal pregnancy developed a pathological venous muscle pump function.

Adult↗
PubMedDate not supplied

Plethysmography as an objective method of audiometry.

In 37 subjects with normal hearing acuity and normal cardiovascular system, vasomotor reactions to sounds of 1024, 2048, and 4096 Hz frequency and 0, 10, 20, 60 and 80 dB intensity above the hearing threshold determined were studied subjectively. Pure sounds evoked in all persons plethysmographic reactions not subject to extinction under the conditions of audiometric investigation.

Acoustic Stimulation↗
PubMed1980

Gravimetric plethysmography for measurement of blood flow in the leg.

The gravimetric plethysmograph measures blood flow in the limb in terms of the increase in weight which follows temporary venous occlusion. Following validation of the device, blood flow in the leg was evaluated in normal subjects and in patients with intermittent claudication. Measurement of the immediate hyperaemic response to a three-minute period of arterial occlusion proved to be very reproducible in patients with occlusive arterial disease of the legs.

Adult↗
PubMed1975

Evaluation of a microcrystalline bovine collagen hemostatic agent in canine solid viscera injury using abdominal impedance plethysmography.

Bioelectric impedance as a sensitive noninvasive technique for detecting and monitoring changes in compartmental body fluid volume was used to compare the efficacy of two hemostatic agents in controlling postoperative abdominal bleeding following surgically induced solid viscera injury. Gelatin foam-oxidized cellulose sponge and bovine MCHH were both effective topical hemostatic agents. It appears that MCCH has certain advantages over conventional agents.

Abdominal Injuries↗