Dynamic compliance of arterial grafts

Baird, R. N.; Kidson, I. G.; L’Italien, Gilbert; Abbott, W M

doi:10.1152/ajpheart.1977.233.5.h568

Cited by 40 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result is in accordance with the com pliance data of the canine and human femoral artery reported in previous publications, which ranged from 0.059 to 0.12% mm Hg_l [11,17,24]. At implantation the studied dial dehyde-starch-preserved bovine internal mammary artery showed half the compliance of the native femoral artery.…”

Section: Discussionsupporting

confidence: 92%

See 1 more Smart Citation

A New Device for the Measurement of the Arterial Compliance Using Implantable Sensors

Welz

Murrmann²,

Hammer³

et al. 1993

Eur Surg Res

View full text Add to dashboard Cite

To determine the compliance of experimental arterial grafts and its chronic adaptation after implantation, a new device for measurements was developed which is combined with implantable sensors. The system is based on the physical induction phenomenon. Each sensor comprises two small coils of copper wire which are sutured opposite to each other to the arterial vessel. Up to 3 sensors are adapted to one electrical connector which can be covered subcutaneously. The device is able to read pulsatile diameter excursions of arterial vessels down to 0.02 mm. It was applied first to evaluate the elastic properties of a 4-mm dialdehyde-starch-preserved bovine internal mammary artery implanted in the canine femoral artery position. For comparison an ePTFE graft was used. At implantation the compliance of the biograft was calculated to be 0.028 ± 0.009% mm Hg^–1, which was half of the compliance of the native femoral artery (0.06 ± 0.0025% mm Hg^–1), but superior if compared to the PTFE (0.008 ± 0.005% mm Hg^–1). Within 6 months the compliance of the femoral artery decreased to 0.039 ± 0.013% mm Hg^–1, which was well matched now to the compliance of the biograft (0.027 ± 0.005% mm Hg^–1).

show abstract

Section: Discussionsupporting

confidence: 92%

“…These include the application of canti lever transducers [17,18] or strain gauges [ 19], the use of a triggered percutaneous ultra sound technique [20,21] and the electromag netic rhcoangiometry [22]. When an external cantilever is applied the complete dissection of the artery or the graft is necessary.…”

Section: Discussionmentioning

confidence: 99%

A New Device for the Measurement of the Arterial Compliance Using Implantable Sensors

Welz

Murrmann²,

Hammer³

et al. 1993

Eur Surg Res

View full text Add to dashboard Cite

show abstract

“…The apparent stiffness of synthetic prostheses should theoretically make them less satisfactory as arterial replacements because of the loss of compliance, but also because of the resulting increase in pulse wave velocity giving rise to higher pulse pressure and increased wave reflections [2]. The compliance mismatch between the graft and the artery imposes excessive stresses on the suture lines, resulting in intimal hyperplasia, suture fatigue or anastomotic aneurysms [8, 21, 27]. Furthermore, the heart interacts with the altered arterial system after banding and, by means of its own adaptation to the altered afterload, contributes to the new aortic and pressure waveforms.…”

Section: Discussionmentioning

confidence: 99%

Left Ventricular Hypertrophy Induced by Reduced Aortic Compliance

et al. 2009

View full text Add to dashboard Cite

Aim: It was the aim of this study to investigate the long- term effects of reduced aortic compliance on cardiovascular hemodynamics and cardiac remodeling. Method: Sixteen swine, divided into 2 groups, a control and a banding group, were instrumented for pressure and flow measurement in the ascending aorta. Teflon prosthesis was wrapped around the aortic arch in order to limit wall compliance in the banding group. Hemodynamic parameters were recorded throughout a 60-day period. After sacrifice, the mean cell surface of the left ventricle was documented. Results: Banding decreased aortic compliance by 49 ± 9, 44 ± 16 and 42 ± 7% on the 2nd, 30th and 60th postoperative day, respectively (p < 0.05), while systolic pressure increased by 41 ± 11, 30 ± 11 and 35 ± 12% (p < 0.05), and pulse pressure by 86 ± 27, 76 ± 21 and 88 ± 23%, respectively (p < 0.01). Aortic characteristic impedance increased significantly in the banding group. Diastolic pressure, cardiac output and peripheral resistance remained unaltered. The mean left ventricular cell surface area increased significantly in the banding group. Conclusions: Acute reduction in aortic compliance results in a significant increase in characteristic and input impedance, a significant decrease in systemic arterial compliance and a subsequent increase in systolic and pulse pressures leading to left ventricular hypertrophy.

show abstract

“…The volumetric increase (dV) of the content is correlated with pressure increase (dP) inside the vein (the equation is C'= dV/dP). [5][6][7][8][9][10][11][12][13][14][15] The components of the media layer of veins, described above, permit to the venous system to achieve high compliance respect to artery. Within the human body 75% of blood circulates in the venous system, because of greater compliance of veins respect the arteries.…”

Section: The Concept Of Venous Compliance and The Philosophy Of Venoumentioning

confidence: 99%

Venous compliance and clinical implications

Zamboni

Tavoni

Sisini

et al. 2018

Veins and Lymphatics

View full text Add to dashboard Cite

Compliance is a characteristic of every deformable system. Compliance is very clear concept in physics and mechanics but in clinics, perhaps, is not the same. However, in veins compliance fits perfectly with the function of drainage of the venous system. Volumetric increase (dV) of the content is correlated with pressure increase (dP) inside the vein according to the equation C’= dV/dP. In humans 75% of the blood is located in the venous system, primarily because the molecular components of a vein media layer is significantly more compliant to that of arteries. This property is fundamental to understanding the change in blood volume in response to a change in posture. Measurements of venous compliance in clinical practice can be done by the means of ultrasound, as well as with the plethysmography. Ultrasound methods assimilate the cross sectional area to the volume of the vein, because it reflects the blood content. Changes in cross sectional area can be reliably measured in response to a change in posture, while pressure can be derived from the hydrostatic pressure changes. Venous compliance is of paramount importance also in pulsatile veins such as the inferior or superior vena cava and the jugular veins, where high resolution ultrasound may accurately derive the cross sectional area. Clinical implications of the mechanical properties of the venous wall are extensively discussed, including the need of dedicated venous stenting, which takes into account venous compliance as the main parameter of the venous function. In addition, venous compliance is the interpretative key for a better understanding of plethysmography curves, as well as of varicose veins and of their return to normal cross sectional area following ambulatory venous pressure reduction.

show abstract

Dynamic compliance of arterial grafts

Cited by 40 publications

References 0 publications

A New Device for the Measurement of the Arterial Compliance Using Implantable Sensors

A New Device for the Measurement of the Arterial Compliance Using Implantable Sensors

Left Ventricular Hypertrophy Induced by Reduced Aortic Compliance

Venous compliance and clinical implications

Contact Info

Product

Resources

About