Cerebral Physiology of the Aged: Influence of Circulatory Disorders

Author(s):  
Walter D. Obrist
2003 ◽  
Vol 76 (6) ◽  
pp. 1972-1981 ◽  
Author(s):  
Justus T Strauch ◽  
David Spielvogel ◽  
Peter L Haldenwang ◽  
Alexander Lauten ◽  
Ning Zhang ◽  
...  

2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Ulrich John ◽  
Christian Meyer ◽  
Monika Hanke ◽  
Henry Völzke ◽  
Anja Schumann

1937 ◽  
Vol 33 (5) ◽  
pp. 626-628
Author(s):  
N. S. Sokolova

Ovarian cysts are quite common among gynecological patients. Surgically available for small hospitals, they are undoubtedly of interest to the general practitioner. Often unnoticed for a long time, ovarian cysts nevertheless always pose for a woman a threat of either cancerous degeneration, or the possibility of twisting, with all its consequences: subsequent fusion with surrounding organs, hemorrhages into the tumor, suppurations, ruptures, peritonitis and lacing. The reason for such detachments is, in essence, still unclear. Franz, Slavyansky believe that the pedicle of the tumor often makes a 90 turn over the upper edge of the broad ligament. With greater twisting, the blood circulation of the tumor is disrupted until it stops completely. With a slow malnutrition of the tumor, the latter first stagnates and then shrinks. Its walls undergo reverse development, and the cyst, thus, can heal itself. With rapid twisting and severe circulatory disorders in the cyst, we have a clinical picture of an "acute abdomen", which requires immediate surgery. Sometimes the cyst leg, twisted with thrombosed vessels, from lack of nutrition, atrophies, becomes thinner and interrupted. The tumor is detached, made either completely free in the abdominal cavity, or feeds through adhesions with the surrounding organs.


Author(s):  
Naoki Yamamoto ◽  
◽  
Ryohei Takada ◽  
Takuma Maeda ◽  
Toshitaka Yoshii ◽  
...  

Introduction: Hyperbaric oxygen (HBO) exposure for 10−15 min has been shown to reduce peripheral blood flow due to vasoconstriction. However, the relationship between decreased peripheral blood flow and the therapeutic effects of HBO treatment on peripheral circulatory disorders remain unknown. Longer exposures have been reported to have vasodilatory effects and increase peripheral blood flow. This study investigated the effect of HBO treatment on blood flow and transcutaneous oxygen pressure (TcPO2). Methods: Twenty healthy volunteers aged 20-65 years (nine males) participated in this study. All participants breathed oxygen for 60 min at 253.3 kPa. Peripheral blood flow using laser Doppler flowmetry and TcPO2 on the ear, hand, and foot were continuously measured from pre-HBO exposure to 10 min post-exposure. Results: Peripheral blood flow in each body part decreased by 7-23% at the beginning of the HBO exposure, followed by a slow increase. Post-exposure, peripheral blood flow increased 4-76% in each body part. TcPO2 increased by 840-1,513% during the exposure period, and remained elevated for at least 10 min after the exposure. Conclusions: The findings of the current study suggest vasoconstriction during HBO treatment is transient, and even when present does not inhibit the development of increased tissue oxygen partial pressure. These findings are relevant to studies investigating changes in peripheral blood flow during HBO treatment in patients with circulatory disorders.


The Lancet ◽  
1905 ◽  
Vol 166 (4277) ◽  
pp. 554
Author(s):  
P.Lake Hope

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