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Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds

Publication ,  Journal Article
Schwartz, LB; Purut, CM; Craig, DM; Smith, PK; McCann, RL
Published in: Vascular and Endovascular Surgery
January 1, 1996

Input impedance describes the relationship between pressure and flow in a vascular system and, hence, characterizes the outflow bed. The purpose of this investigation was to measure input impedance spectra in vascular reconstructions of skeletal muscle, renal, and mesenteric beds. Input impedance was measured in 107 vascular reconstructions in 96 patients. Reconstructions were performed at the aortofemoral/aortoiliac (AF, n = 20), femoropopliteal (FP, n=18), femorodistal (FD, n=41), infrapopliteal-inframalleolar (IM, n = 6), renal (REN, n = 16), or mesenteric (MES, n= 6) level. Grafts were constructed from autologous vein in all cases except AF bypasses in which bifurcated woven Dacron grafts were employed. Input impedance was measured intraoperatively after reperfusion. For impedance calculation, simultaneously acquired intraluminal pressure (transducer-tipped pressure catheter) and blood flow (electromagnetic probe) waveforms of ten-second duration were digitized at 200 Hz and subjected to Fourier transformation in near real-time. AF grafts exhibited the highest blood flow (443 ± 72.8 mL/minute) followed by MES (300 ± 30.4), REN (172 ± 43.9), FP (91.6 ± 20.0), FD (59.3 ± 5.09), and IM grafts (22.4 ± 5.44 mL/minute). A similar (inverse) trend was observed with respect to resistance (Rin), ie, MES≈AF

Duke Scholars

Published In

Vascular and Endovascular Surgery

DOI

ISSN

1538-5744

Publication Date

January 1, 1996

Volume

30

Issue

6

Start / End Page

459 / 470

Related Subject Headings

  • Cardiovascular System & Hematology
 

Citation

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Schwartz, L. B., Purut, C. M., Craig, D. M., Smith, P. K., & McCann, R. L. (1996). Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds. Vascular and Endovascular Surgery, 30(6), 459–470. https://doi.org/10.1177/153857449603000604
Schwartz, L. B., C. M. Purut, D. M. Craig, P. K. Smith, and R. L. McCann. “Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds.” Vascular and Endovascular Surgery 30, no. 6 (January 1, 1996): 459–70. https://doi.org/10.1177/153857449603000604.
Schwartz LB, Purut CM, Craig DM, Smith PK, McCann RL. Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds. Vascular and Endovascular Surgery. 1996 Jan 1;30(6):459–70.
Schwartz, L. B., et al. “Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds.” Vascular and Endovascular Surgery, vol. 30, no. 6, Jan. 1996, pp. 459–70. Scopus, doi:10.1177/153857449603000604.
Schwartz LB, Purut CM, Craig DM, Smith PK, McCann RL. Input Impedance of Revascularized Skeletal Muscle, Renal, and Mesenteric Vascular Beds. Vascular and Endovascular Surgery. 1996 Jan 1;30(6):459–470.
Journal cover image

Published In

Vascular and Endovascular Surgery

DOI

ISSN

1538-5744

Publication Date

January 1, 1996

Volume

30

Issue

6

Start / End Page

459 / 470

Related Subject Headings

  • Cardiovascular System & Hematology