Twenty-four hour blood flow in the forefoot after reconstructive vascular surgery
Local blood flow in the forefoot (SBF) was measured continuously during 24 hours by 133xenon clearance technique in 10 patients prior to and at least 1 year after successful reconstructive vascular surgery for severe arterial insufficiency (mean: 18 months, range: 12-36). A group of 10 patients with normal peripheral circulation served as a control group. In spite of a considerable increase of the ankle/arm systolic blood pressure index--preoperative: 0.30 +/- 0.12, postoperative: 0.78 +/- 0.28 (mean +/- 1 SD)--the SBF decreased by 50% (p less than 0.001) following reconstructive vascular surgery during day activities. During sleep, however, SBF increased by 80% (p less than 0.001). The relative changes in SBF from day to night at the postoperative examination did not differ from that of the control group, i.e., the normal 24-hour blood flow pattern had been obtained. These changes in SBF are explained by the reappearance of peripheral vasoregulatory mechanisms. Postreconstructive hyperemia was evaluated by the same technique. The changes in SBF following surgery in the positions supine, awake and supine, asleep were found to be insignificant (0.80 less than p less than 0.90). It is concluded that the long-term postreconstructive hyperemia merely is a reflection of the normal 24-hour blood flow pattern.
- Research Organization:
- Bispebjerg Hospital, Copenhagen, Denmark
- OSTI ID:
- 5094704
- Journal Information:
- Ann. Surg.; (United States), Vol. 2
- Country of Publication:
- United States
- Language:
- English
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RADIOISOTOPE SCANNING
ARTERIES
BLOOD PRESSURE
BLOOD-PLASMA CLEARANCE
ISCHEMIA
PATIENTS
SURGERY
XENON 133
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BLOOD VESSELS
BODY
BODY AREAS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
CLEARANCE
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DISEASES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEGS
LIMBS
MEDICINE
NUCLEI
ORGANS
RADIOISOTOPES
VASCULAR DISEASES
XENON ISOTOPES
550601* - Medicine- Unsealed Radionuclides in Diagnostics