Head-up tilt effect on glomerular filtration rate, renal plasma flow, and mean arterial pressure in spinal man.
Arch Phys Med Rehabil
; 62(7): 306-10, 1981 Jul.
Article
en En
| MEDLINE
| ID: mdl-7247656
ABSTRACT
Changes in glomerular filtration rate (GRF), renal plasma flow (RPF), and mean arterial pressure (MAP) were measured in subjects tested in supine and head-up tilt positions with various levels of spinal cord lesion and thus with different degrees of supraspinal sympathetic vasomotor control. Responses of paraplegic subjects to head-up tilt were not significantly different from those of normal controls but GFR and RPF were significantly lower in quadriplegics in the supine position. With tilt, MAP and RPF decreased significantly, but the fall in GFR was not significant. In all 3 groups, the GFR during head-up tilt was similar, indicating that in spite of the great loss of supraspinal sympathetic control, quadriplegic subjects apparently equally-constrict their afferent and efferent renal arterioles during orthostatic stress and thus prevent excessive fall of GFR.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Postura
/
Traumatismos de la Médula Espinal
Límite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Arch Phys Med Rehabil
Año:
1981
Tipo del documento:
Article