TY - JOUR
T1 - Air-plethysmography and the effect of elastic compression on venous hemodynamics of the leg
AU - Christopoulos, D. G.
AU - Nicolaides, A. N.
AU - Szendro, G.
AU - Irvine, A. T.
AU - Bull, Mui Ian
AU - Eastcott, H. H.G.
N1 - Funding Information:
We are grateful to Kendall Research Center, Barrington, Illinois, for providing the air-plethysmograph, to Patras University Medical School for providing study leave and financial support to Dr. D.C. Christopoulos, to Zyma UK Ltd. for a grant to Mrs. M. Bull, to Mr. K. Myers, Professor A. Downs, Mr. J. T. Hobbs, and Professor H. A. F. Dudley for their advice, and to Miss Anne Taft for secretarial help.
PY - 1987/1/1
Y1 - 1987/1/1
N2 - Leg volume changes during exercise have been measured in absolute units (milliliters) by means of a new method of air-plethysmography. Venous volume (VV), venous filling time, and venous filling index on standing from the recumbent position, ejected volume (EV) and ejection fraction (EF = EV × 100/VV) with one tiptoe movement, and residual volume (RV) and residual volume fraction (RVF = RV × 100/VV) after 10 tiptoe movements were measured in normal limbs, limbs with superficial venous incompetence, and limbs with deep venous disease. The same measurements were repeated with a graduated medium compression stocking in limbs with SVI and graduated high compression stockings in limbs with DVD. Ambulatory venous pressure was measured at the same time, with a needle in a vein in the foot. The results indicate that this method of air-plethysmography is not only of diagnostic value but offers a new and unique technique to assess and study the hemodynamic effects of different forms of elastic compression. The lower ambulatory venous pressure, produced by the elastic compression, was the result of a reduction in reflux and an improvement in the calf muscle ejecting ability during rhythmic exercise.
AB - Leg volume changes during exercise have been measured in absolute units (milliliters) by means of a new method of air-plethysmography. Venous volume (VV), venous filling time, and venous filling index on standing from the recumbent position, ejected volume (EV) and ejection fraction (EF = EV × 100/VV) with one tiptoe movement, and residual volume (RV) and residual volume fraction (RVF = RV × 100/VV) after 10 tiptoe movements were measured in normal limbs, limbs with superficial venous incompetence, and limbs with deep venous disease. The same measurements were repeated with a graduated medium compression stocking in limbs with SVI and graduated high compression stockings in limbs with DVD. Ambulatory venous pressure was measured at the same time, with a needle in a vein in the foot. The results indicate that this method of air-plethysmography is not only of diagnostic value but offers a new and unique technique to assess and study the hemodynamic effects of different forms of elastic compression. The lower ambulatory venous pressure, produced by the elastic compression, was the result of a reduction in reflux and an improvement in the calf muscle ejecting ability during rhythmic exercise.
UR - http://www.scopus.com/inward/record.url?scp=0023093342&partnerID=8YFLogxK
U2 - 10.1016/0741-5214(87)90205-9
DO - 10.1016/0741-5214(87)90205-9
M3 - Article
AN - SCOPUS:0023093342
SN - 0741-5214
VL - 5
SP - 148
EP - 159
JO - Journal of Vascular Surgery
JF - Journal of Vascular Surgery
IS - 1
ER -