Relative hematocrit in human skin capillaries and its relation to capillary blood flow velocity☆
References (13)
- et al.
Capillary flow velocity measurements in vivo and in situ by television methods
Microvasc. Res.
(1975) - et al.
Measurement of capillary hematocrit by photometric techniques
Microvasc. Res.
(1973) - et al.
Plug effect of erythrocyte in capillary blood vessels
Biophys. J.
(1970) Blood vessels and lymphatics of the skin
- et al.
The reactions of the blood vessels of the hand during increase in transmural pressure
J. Physiol.
(1956) Vital capillary microscopy
Scand. J. Clin. Lab. Invest.
(1973)
Cited by (76)
Systemic low-frequency oscillations in resting-state fMRI
2023, Advances in Resting-State Functional MRI: Methods, Interpretation, and ApplicationsNailfold video capillaroscopy as a useful diagnostic tool in systemic vasculitis
2022, Microvascular ResearchCitation Excerpt :Rolling, representing a disrupted flow of red blood cells within the capillaries, was found frequently (roughly 75 % of fingers) in patients with active vasculitis, significantly more than in the inactive vasculitis group or in healthy controls. Martino et al. (2002) have reported in 20 % of pediatric patients with HSP “temporary arrest in capillary blood flow (sludging)”, and a similar phenomenon “plasma gap” has also been described as a sign of reduced velocity (Fagrell et al., 1980; Asghar et al., 2020). These reports are in line with our observation and probably reflect the same finding.
Extracellular fluid tonicity impacts sickle red blood cell deformability and adhesion
2017, BloodCitation Excerpt :To isolate sRBCs, whole blood was drawn into citrate tubes and washed 3 times in PBS to remove other blood components. Packed sRBCs were then diluted to 0.5% hematocrit (HCT) in the various admixtures, mixed for 10 minutes, and perfused into microfluidic devices via a syringe pump (Harvard Apparatus) for 2 minutes at 0.3 µL/min, resulting in velocities similar to that seen in the human capillary system.44-46 Transit times, velocities, and propensity for occlusion of sRBCs under normoxic conditions were tracked using video microscopy (supplemental Movie 1).
Blood Flow Measurement
2014, Comprehensive Biomedical PhysicsRelevance of depth resolution for cerebral blood flow monitoring by near-infrared spectroscopic bolus tracking during cardiopulmonary bypass
2006, Journal of Thoracic and Cardiovascular SurgeryCitation Excerpt :Before CPB, 3 of 4 patients showed earlier arrival of the tracer bolus in the intracerebral than the extracerebral compartment, which is in good agreement with the physiologic expectation of higher blood flow velocities in brain than in skin. Whereas mean capillary blood flow velocity in human skin varies between 0.15 and 0.25 mm/s,25 velocities in capillaries of the central nervous system (eg, the olfactory bulb glomeruli) range between 0.2 and 1.0 mm/s, with a mean of 0.57 mm/s.26 Whereas pre-CPB and post-CBF tracer kinetics can be directly compared by calculation of BFI, tracer arrival time and bolus dilution will be altered during CPB as a result of bolus passage through the extracorporeal circuit.
Noninvasive testing in the clinical laboratory
2002, Clinics in Laboratory Medicine
- ☆
Supported by grants from Albert and Gerda Svenson's Foundation, Swedish National Association against Heart and Chest Diseases, Loo and Hans Osterman's Foundation and USPHS HL 12493.