Artículo
Abstract:
Introduction: The prosthesis nowadays used in the vascular access for haemodialysis have low patency rates, mainly due to the luminal obstruction, determined by the intimal hyperplasia. Several factors have been related to de development of intimal hyperplasia and graft failure. Among them are the differences in the biomechanical properties between the prosthesis and the native vessels. In the searching for vascular prosthesis that overcome the limitations of the currently used, the cryopreserved vessels (cryografts) appear as an alternative of growing interest. However, it is unknown if the mechanical differences or mismatch between prosthesis and native vessels are lesser when using cryografts. Objective: To characterize and compare the biomechanical behaviour of native vessels used in vascular access and cryografts. Additionally, segments of expanded polytetrafluoroethylene (ePTFE) were also evaluated, so as to evaluate the potential biomechanical advantages of the cryografts respect to synthetic prosthesis used in vascular access. Methods: Segments from human humeral (n = 12), carotid (n = 12) and femoral (n = 12) arteries, and saphenous vein (n = 12), were obtained from 6 multiorgan donors. The humeral arteries were studied in fresh state. The other segments were divided into two groups, and 6 segments from each vessel were studied in fresh state, while the remaining 6 segments were evaluated after 30 days of criopreservation. For the mechanical evaluation the vascular segments and 6 segments of ePTFE were mounted in a circulation mock and submitted to haemodynamic conditions similar to those of in vivo. Instantaneous pressure (Konigsberg) and diameter (Sonomicrometry) were measured and used to calculate the viscous and elastic indexes, the compliance, distensibility and characteristic impedance. For each mechanical parameter studied, the mismatch between the prosthesis and the native vessel was evaluated. Results: The ePTFE was the prosthesis with the higher mechanical mismatch (p < 0.05). The venous and arterial cryografts showed the least mismatch with native veins and arteries, respectively. The prosthesis with the least mechanical mismatch was different, depending on the native vessel evaluated, and for a native vessel, on the parameter considered. Conclusion: The mechanical mismatch between the native vessel and the vascular prosthesis used in a vascular access could be reduced using cryografts.
Registro:
| Documento: | Artículo |
| Título: | Vascular accesses for haemodyalisis: Comparative analysis of the mechanical behaviour of native vessels and prosthesis |
| Autor: | Bia Santana, D.; Zócalo, Y.; Armentano, R.; Pérez, H.; Cabrera, E.; Saldías, M.; Galli, C.; Álvarez, I. |
| Filiación: | Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Uruguay Facultad de Ingeniería Y Ciencias Exactas Y Naturales, Universidad Favaloro, Buenos Aires, Argentina Ingeniería Cardiovascular, Facultad Regional Buenos Aires, Universidad Tecnológica Nacional, Buenos Aires, Argentina Instituto Nacional de Donación Y Trasplante de Células Tejidos Y Órganos, Ministerio de Salud Pública-Facultad de Medicina, Universidad de la República, Uruguay CONICET, Buenos Aires, Argentina Departamento de Fisiología, Facultad de Medicina, Universidad de la República, General Flores 2125, CP: 11800, Montevideo, Uruguay |
| Idioma: | Español |
| Palabras clave: | Compliance; Elaticity; Mechanical mismatch; Vascular access; politef; adult; arteriovenous shunt; article; biomechanics; blood vessel; comparative study; human; indwelling catheter; renal replacement therapy; Adult; Arteriovenous Shunt, Surgical; Biomechanics; Blood Vessels; Catheters, Indwelling; Humans; Polytetrafluoroethylene; Renal Dialysis |
| Año: | 2006 |
| Volumen: | 26 |
| Número: | 5 |
| Página de inicio: | 587 |
| Página de fin: | 593 |
| Título revista: | Nefrologia |
| Título revista abreviado: | Nefrologia |
| ISSN: | 02116995 |
| CODEN: | NEFRD |
| CAS: | politef, 9002-84-0, 9039-02-5; Polytetrafluoroethylene, 9002-84-0 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02116995_v26_n5_p587_BiaSantana |
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Citas:
---------- APA ----------
Bia Santana, D., Zócalo, Y., Armentano, R., Pérez, H., Cabrera, E., Saldías, M., Galli, C.,..., Álvarez, I. (2006) . Vascular accesses for haemodyalisis: Comparative analysis of the mechanical behaviour of native vessels and prosthesis . Nefrologia, 26(5), 587-593.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02116995_v26_n5_p587_BiaSantana [ ]
---------- CHICAGO ----------
Bia Santana, D., Zócalo, Y., Armentano, R., Pérez, H., Cabrera, E., Saldías, M., et al. "Vascular accesses for haemodyalisis: Comparative analysis of the mechanical behaviour of native vessels and prosthesis " . Nefrologia 26, no. 5 (2006) : 587-593.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02116995_v26_n5_p587_BiaSantana [ ]
---------- MLA ----------
Bia Santana, D., Zócalo, Y., Armentano, R., Pérez, H., Cabrera, E., Saldías, M., et al. "Vascular accesses for haemodyalisis: Comparative analysis of the mechanical behaviour of native vessels and prosthesis " . Nefrologia, vol. 26, no. 5, 2006, pp. 587-593.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02116995_v26_n5_p587_BiaSantana [ ]
---------- VANCOUVER ----------
Bia Santana, D., Zócalo, Y., Armentano, R., Pérez, H., Cabrera, E., Saldías, M., et al. Vascular accesses for haemodyalisis: Comparative analysis of the mechanical behaviour of native vessels and prosthesis . Nefrologia. 2006;26(5):587-593.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02116995_v26_n5_p587_BiaSantana [ ]
