Interstitial fluid pressure

Guyton, Arthur C.; Granger, Harris J.; Taylor, Aubrey E.

doi:10.1152/physrev.1971.51.3.527

Cited by 450 publications

(119 citation statements)

References 7 publications

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Section: Discussionmentioning

confidence: 99%

“…Pressure measured by balloon catheters is considered to represent total pressure; wick catheters and needles are believed to measure¯uid pressure (Guyton et al 1971). We abandoned the use of needles after preliminary experiments (not reported here) in which the probe registered negative pressures during muscular contraction; this has been attributed to a ball-valve eect at the tip of the needle (Guyton et al 1971). The slit catheter is similar in accuracy to the wick catheter but has a higher frequency response (Fronek et al 1987Sejersted et al 1984) and does not require continuous infusion of¯uid (Sejersted et al 1984).…”

Section: Discussionmentioning

confidence: 99%

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Intramuscular pressure, force and blood flow in rabbit tibialis anterior muscles during single and repetitive contractions

Degens

Salmons

Jarvis

1998

European Journal of Applied Physiology

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The elevated intramuscular pressure (IMP) associated with sustained muscle contraction can affect blood flow, and could influence the long-term viability of functional skeletal muscle grafts. We therefore examined the relationship between force, peak IMP and blood flow in the tibialis anterior muscle of the anaesthetized rabbit. During isometric contractions. IMP was related linearly to force, and only the slope of the relationship varied between animals. During isotonic contractions, however, the highest values of IMP were found at the lowest force levels, and IMP appeared to be related to the amount and speed of shortening. During repeated isometric contractions, the ratio of IMP to force varied with time, stimulation pattern and subject. Mean blood flow did not differ appreciably between repetitive isometric contractions at duty cycles of 10-40%, and was unrelated to integrated pressure, integrated force, or depth from the surface. We conclude: (1) that IMP is unlikely to affect mean blood flow during cyclic activity that has a duty cycle less than 40%; and (2) that the clinical use of IMP as a predictor of muscle force appears to be justified only for single isometric contractions, and needs to be interpreted cautiously when contractions involve shortening or fatigue.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Intramuscular pressure, force and blood flow in rabbit tibialis anterior muscles during single and repetitive contractions

Degens

Salmons

Jarvis

1998

European Journal of Applied Physiology

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“…2 a General concept for the model (one segment), b 11-cylinder model for the representation of human body with R e and IntF distribution (R e in (%) of a HF measurement, according to values given by [1]), c cylinder model structure, and d two-pool model Fig. 3 Relationship between relative IntF, P IntF and relative amount of lymphatic fluid according to [14,13] and their mathematical approximations: Eqs. 18, 19…”

Section: Methodsmentioning

confidence: 99%

“…The change of P IntF was calculated adapting the nonlinear relationship between IntF and P IntF for the whole body to a body segment, adapting the curve presented in [14] in terms of the relative amount of IntF (IntF Rel ) to P IntF (Fig. 3, left).…”

Section: Active Nonlinear Two-pool Modelmentioning

confidence: 99%

Model-based correction of the influence of body position on continuous segmental and hand-to-foot bioimpedance measurements

Medrano

Eitner

Walter

et al. 2010

Med Biol Eng Comput

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Bioimpedance spectroscopy (BIS) is suitable for continuous monitoring of body water content. The combination of body posture and time is a well-known source of error, which limits the accuracy and therapeutic validity of BIS measurements. This study evaluates a model-based correction as a possible solution. For this purpose, an 11-cylinder model representing body impedance distribution is used. Each cylinder contains a nonlinear two-pool model to describe fluid redistribution due to changing body position and its influence on segmental and hand-to-foot (HF) bioimpedance measurements. A model-based correction of segmental (thigh) and HF measurements (Xitron Hydra 4200) in nine healthy human subjects (following a sequence of 7 min supine, 20 min standing, 40 min supine) has been evaluated. The model-based compensation algorithm represents a compromise between accuracy and simplicity, and reduces the influence of changes in body position on the measured extracellular resistance and extracellular fluid by up to 75 and 70%, respectively.

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“…Celle-ci précise qu'au niveau capillaire il existe un flux liquidien plasmatique quittant le secteur vasculaire pour gagner l'espace interstitiel (EI). Il s'agit d'une filtration qui varie en fonction de la perméabilité de la membrane capillaire et des différentes pressions hydrostatique et oncotique qui s'exercent aussi bien à l'extrémité artérielleq u'à l'extrémité veineuse du capillaire sanguin [6].…”

Section: Introductionunclassified

Les mécanismes physiopathologiques du lymphœdème

Thibaut¹

2016

Hegel

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RésuméLe lymphoedème est une affection chronique primitivement due à une absence ou une insuffisance de drainage de la lymphe produite. Son traitement est bien codifié et consiste à réduire le volume de l'oedème constitué,a fi nd ' é viter la survenue de complications. Dans d'autres conditions pathologiques un oedème peut survenir consécutivement à des mécanismes physiopathologiques où se mêlent l'accroissement de la perméabilité de la membrane capillaire, l'augmentation de la pression veineuse dans la circulation de retour,l 'hyposystolie et aussi les déficiences d'autres organes. L'oedème qui survient est alors d'une autre nature mais il existe presque toujours concomitamment une part d'insuffisance fonctionnelle du drainage lymphatique. Ces différentes situations sont évoquées et illustrées dans le texte à l'aide de schémas qui permettent de bien appréhender les mécanismes physiopathologiques à l'origine des oedèmes et du lymphoedème proprement dit. mots-clés

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Interstitial fluid pressure

Cited by 450 publications

References 7 publications

Intramuscular pressure, force and blood flow in rabbit tibialis anterior muscles during single and repetitive contractions

Intramuscular pressure, force and blood flow in rabbit tibialis anterior muscles during single and repetitive contractions

Model-based correction of the influence of body position on continuous segmental and hand-to-foot bioimpedance measurements

Les mécanismes physiopathologiques du lymphœdème

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