Peripheral and Myometrial Circulation in Pregnancy

Jansson, Inge

doi:10.3109/00016346909157179

Cited by 5 publications

(2 citation statements)

References 46 publications

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“…The present finding of significantly larger pulse volume amplitudes in the forearm and index finger of pregnant women compared to non-pregnant controls, could be explained by the increased stroke volume, in addition to a widened pulse pressure and a lower peripheral resistance (Metcalfe & Ueland 1974). The increased PVR in the upper extremity of pregnant women agrees well with reports on other hemodynamic changes during pregnancy: An increased blood flow in the hand (Abramson et al 1943) and forearm (Jansson 1969;Spetz 1964) and increased digital pulsations recorded photographically (Herbert et al 1958).…”

Section: Commentsupporting

confidence: 90%

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Blood Circulation Changes in the Eye and Limbs

Hørven¹,

Gjønnaess²,

Kroese³

1976

Acta Ophthalmologica

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Alterations in corneal indentation pulse (CIP) amplitudes and pulse volume recordings (PVR) on the limbs were demonstrated in pregnant women, indicating that significant changes occur in the peripheral blood circulation during pregnancy. The PVR measured at week 30-36 of gestation demonstrated a significant increase when recorded on the forearm and index finger. In the eye an increase in CIP amplitudes was found early in pregnancy. From week 20 on, however, a steady decrease occurred, until the CIP amplitudes at term averaged about 1/3 of the values from normal, non-pregnant women. Similar changes, although less pronounced, were demonstrated in the ocular blood circulation during oral contraceptive treatment and, to some extent, during menstruation. Intake of gestagens and diaethyl-stilboestrol did not alter the CIP amplitudes. Wilke K. (1975) Episcleral venous pressure and pregnancy. Acta ophthul. (Kbh.) Supfil. 125. 40-41.

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Section: Commentsupporting

confidence: 90%

“…Increased peripheral blood flow during pregnancy is probably mainly due to skin flow (Jansson 1969;Spetz 1964). Since skin constitutes a larger portion of the total volume of the finger and forearm than of the thigh and calf, the influence of changes in skin flow during pregnancy may, therefore, be mainly manifested in the upper limb.…”

Section: Commentmentioning

confidence: 99%

Blood Circulation Changes in the Eye and Limbs

Hørven¹,

Gjønnaess²,

Kroese³

1976

Acta Ophthalmologica

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Experimentelle Untersuchungen zur Wirkung von Blutdrucksteigerungen auf den Blutflu� von Myometrium und Niere in der Schwangerschaft

Schmidt

1976

Arch. Gyn�k.

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In experiments with animals it was investigated the endurance of the myometrial and the blood flow of the renal cortex during endogenous pressure substances. At the same time it was tested, if treatment with sexual hormones or a pregnancy had the tested principles and changes through pressure substances, and that the changes were significant. The investigations were conducted on three groups of female rabbits. The blood changes in myometrial and in the uterine were measured and continually registered with the special heated thermistor, from the principle of the thermoclearance. The success of the blood pressure was intraarterial measured with an electric mechanism. Precisely the same doses (in relativity of the animals weight) of pressure substances were applied with an infusions pump intravenously. And pressure substances Angiotensin II, Norepinephrine and Epinephrine, and their actions on the blood pressure and blood flow through the myometrium and through the renal cortex were examined. Altogether 131 values were registered. The results of the study that were statistically secure were as follows: a) The uterine blood flow pro tissue volume unit stays constant also by pregnancy or pseudopregnancy. b) The blood flow of the kidney is perhaps twice as high as the myometrial. c) The myometrial blood flow is with the arterial systolic blood pressure tightly correlated. Blood pressure increases through Angiotensin-infusion and also recovery of the uterine blood flow. d) An autoregulation of the uterine blood flow is not observed. e) The decrease of the renal blood flow after the giving of pressure substances was not modified through pregnancy. f) In quality the behaviour of the organ blood flow is the same after applied infusion of the pressure substances. Quantity differences exist however between Angiotensin II, Norepinephrine and Epinephrine. The method of measuring the blood flow through the uterus and in the kidney was placed in one view there. The finding of another examination groups for the problem of the organ blood flow in pregnancy was under critical consideration the methods combined and in connection with the proper examinations discussed. Till now in the theory over the cause of EPH-syndrom the predominate recently compiled comprehensive summary was; the proper body pressure substances--especially from the renin Angiotensin system--after chronical invoices it was decides diminished uterus blood flow appeared. After the earlier results were not all secure. The proper examination speech was therefore, that regarding the kidney function relevant alterations, also unter the conditions of pregnancy, are to be observed. The pressure dependant regulation of myometrial blood flow without proving autoregulation required however another test of the predominante gestose theory.

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Die 133-Xenon Clearance der Armmuskulatur

Held

Schreier

1974

Klin Wochenschr

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Peripheral and Myometrial Circulation in Pregnancy

Cited by 5 publications

References 46 publications

Blood Circulation Changes in the Eye and Limbs

Blood Circulation Changes in the Eye and Limbs

Experimentelle Untersuchungen zur Wirkung von Blutdrucksteigerungen auf den Blutflu� von Myometrium und Niere in der Schwangerschaft

Die 133-Xenon Clearance der Armmuskulatur

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