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Changes in microcirculation after ischemic process in rat skeletal muscle

✍ Scribed by Norbert Nemeth; Tamas Lesznyak; Endre Brath; Gabor Acs; Arpad Nagy; Jozsef Pap-Szekeres; Istvan Furka; Iren Miko


Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
93 KB
Volume
23
Category
Article
ISSN
0738-1085

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✦ Synopsis


Abstract

Laser Doppler flowmetry (LDF) is a good method to investigate tissue microcirculation, but it has many standardization and measuring problems. To exclude these effects, we performed a test using LDF on rat skeletal muscle. In 12 CD outbred anesthetized rats, bilateral femoral vessels and the quadriceps femoris muscle were exposed. The left femoral artery and vein were clamped for 1 h by microvascular clips (ischemic side). On the right side, no other intervention was made (control side). An LDF probe was applied on the medial vastus muscle. Short‐term occlusions (2–3 s) were performed before and after the 1‐h clamping and on the control side while LDF curves were registered. The halftimes of ascending curves on the ischemic side were significantly elongated vs. the condition before clamping (P = 0.0007) or the control side (P = 0.0017). Microcirculatory changes caused by 1‐h ischemia were shown by this simple, quick, and well‐reproducible test on rat skeletal muscle.

A lézer Doppler (LD) áramlásmérés elfogadott módszer a szöveti mikrokeringés vizsgálatára, bár számos standardizációs és mérési problémája lehet. E nehézségek kizárására kifejlesztettünk egy tesztet patkány harántcsíkolt izomszöveten. 12 CD outbred patkány a. és v. femoralisát és a m. quadriceps femorist feltártuk mindkét oldalon. A bal oldali femoralis ereket microvascularis clippekkel 1 órára leszorítottuk (ischaemiás oldal), míg a jobb oldalon egyéb beavatkozás nem történt (kontroll oldal). A LD mérőfejet a m. vastus medialisra helyeztük. Az 1 órás leszorítás előtt és után illetve a kontroll oldalon rövid időtartamú (2–3 s) occlusiót idéztünk elő, miközben a LD jelet folyamatosan rögzítettük. A felszálló LD görbék 50%‐os értékénél mért idő szignifikánsan hosszabb volt a kontroll oldalhoz (P = 0.0017) illetve a beavatkozás előtti állapothoz képest (P = 0.0007). Ezzel az egyszerű, gyors és jól reprodukálható teszttel az 1 órás ischaemia indukálta mikrocirculációs változásokat sikerült kimutatni patkány vázizomban. © 2003 Wiley‐Liss, Inc. MICROSURGERY 23:419–423 2003


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