Venous Pressure and Compliance of the Peripheral Capacitance Vessels

Kato, Masataka; Saiki, Sechi; Ogino, Tadayoshi; Suzuki, Tomoyuki; Kojima, Atsumi; Koeda, Toshihiko; Kimura, Takeshi

doi:10.1177/000331977602701201

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Therefore, care should be taken when extrapolating these results to other populations. Interestingly, alterations in limb venous compliance have been documented in numerous conditions in humans including healthy aging (6,10,20,23,31,34), endurance training (10,20), orthostatic intolerance (3,4,29), diabetes (1,27), heart failure (14,15), multiple system atrophy (17), spinal cord injury (5,12,32,33), and between sexes (10,16,18,19,21). The findings obtained by using VOP to assess venous parameters in such physiological states are limited in that they provide a global index of overall limb venous function, and whether these changes are reflective of alterations at the level of a single vein is unknown.…”

Section: Discussionmentioning

confidence: 99%

Ultrasound assessment of popliteal vein compliance during a short deflation protocol

Young¹,

Prasad²,

Fullenkamp³

et al. 2008

Journal of Applied Physiology

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The purpose of the present study was to determine whether ultrasound is a useful tool to measure the venous characteristics of the lower extremity during a standard venous collecting cuff deflation protocol. To accomplish this, lower extremity pressure-cross-sectional area (CSA) and pressure-volume relationships were measured in eight (25 +/- 1 yr) supine subjects. Popliteal vein CSA was assessed by using high-resolution ultrasound, while calf volume changes were simultaneously assessed by using venous occlusion plethysmography (VOP). Pressure-CSA and pressure-volume relationships were assessed at baseline, during the cold pressor (CP) test, and following sublingual nitroglycerin (NTG) administration. Relationships were modeled with a quadratic regression equation, and beta(1) and beta(2) were used as indexes of venous compliance. Popliteal vein regression parameters beta(1) (8.485 +/- 2.616 vs. 7.638 +/- 2.664, baseline vs. CP; 8.485 +/- 2.616 vs. 7.734 +/- 3.076, baseline vs. NTG; both P > 0.05) and beta(2) (-0.0841 +/- 0.0241 vs. -0.0793 +/- 0.0242, baseline vs. CP; -0.0841 +/- 0.0241 vs. -0.0771 +/- 0.0280, baseline vs. NTG; both P > 0.05) were not affected by CP or NTG. Similarly, calf regression parameters beta(1) and beta(2), obtained with VOP, were not altered during either trial. Intraclass correlations for venous compliance assessed with ultrasound and VOP were 0.92 and 0.97, respectively, indicating acceptable reproducibility. These data suggest that ultrasound is a functional and reproducible tool to assess the venous characteristics of the lower extremity, in addition to VOP. Additionally, popliteal vein and calf compliance were not affected by the CP test or NTG.

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Section: Discussionmentioning

confidence: 99%

Ultrasound assessment of popliteal vein compliance during a short deflation protocol

Young¹,

Prasad²,

Fullenkamp³

et al. 2008

Journal of Applied Physiology

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“…Sharp objects typically produce linear incisions with clearly defined edges, while blunt impacts can result in more complex wounds that are particularly challenging to seal. [ 48 ] To investigate the feasibility of using F20HD5 hydrogel to seal complex corneal lacerations, an ex vivo study was further conducted using two additional types of full‐thickness corneal lacerations: corneal T‐shaped incisions and corneoscleral linear incisions ( Figure ). The incisions were created using a surgical 15° stab knife on freshly enucleated porcine eyes.…”

Section: Resultsmentioning

confidence: 99%

Photocurable and Temperature‐Sensitive Bioadhesive Hydrogels for Sutureless Sealing of Full‐Thickness Corneal Wounds

Wang,

Zhao,

et al. 2023

Small Methods

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Penetrating corneal wounds can cause severe vision impairment and require prompt intervention to restore globe integrity and minimize the risk of infection. Tissue adhesives have emerged as a promising alternative to suturing for mitigating postoperative complications. However, conventional water‐soluble adhesives suffer formidable challenges in sealing penetrating corneal wounds due to dilution or loss in a moist environment. Inspired by the robust adhesion of mussels in aquatic conditions, an injectable photocurable bioadhesive hydrogel (referred to as F20HD5) composed of polyether F127 diacrylate and dopamine‐modified hyaluronic acid methacrylate is developed for sutureless closure of corneal full‐thickness wounds. F20HD5 exhibits high transparency, wound‐sealing ability, proper viscosity, biodegradability, and excellent biocompatibility. It allows in situ cross‐linking via visible light, thereby providing sufficient mechanical strength and adhesiveness. In vivo, the adhesive hydrogel effectively closed penetrating linear corneal incisions and corneal injuries with minimal tissue loss in rabbits. During the 56‐day follow‐up, the hydrogel facilitates the repair of the injured corneas, resulting in more symmetrical curvatures and less scarring in distinction to the untreated control. Thus, bioinspired hydrogel holds promise as an effective adhesive for sealing full‐thickness corneal wounds.

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“…Resistance of the vein is reported to be approximately 100 dyne/sec/cm, 5 about one-fifteenth to one-twentieth of the artery, while its capacity is about 25 (18 to 30) times that of the artery. 15 It has been reported that the innervation of sympathetic vasoactive fibers on veins grows stronger as one moves away from a central site to a peripheral area. 16 When these characteristics of the venous system are applied to blood circulation in a venous flap, the following speculations can be raised.…”

Section: Mechanism Of Venous Flapmentioning

confidence: 99%

An Experimental Study of the Venous Flap: Investigation of the Recipient Vein

Inada¹,

Fukui²,

Tamai³

et al. 1990

J reconstr Microsurg

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In previous studies using rabbit ears, total venous perfusion flaps (TVPF) were used that did not contain in the experimental model any chosen arteries truly representative of clinical venous flaps. We discovered that the TVPF could survive even under conditions of poor blood circulation. In the present study, conditions of the recipient veins were investigated using flow-through veins in TVPFs of rabbit ears and human dorsal digital veins. The research suggested that conditions for TVPF survival are a high density of the venous network in the flap and the presence of venous oscillation, high oxygen tension, and effective blood flow in the recipient vein. 123

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Venous Pressure and Compliance of the Peripheral Capacitance Vessels

Cited by 6 publications

References 2 publications

Ultrasound assessment of popliteal vein compliance during a short deflation protocol

Ultrasound assessment of popliteal vein compliance during a short deflation protocol

Photocurable and Temperature‐Sensitive Bioadhesive Hydrogels for Sutureless Sealing of Full‐Thickness Corneal Wounds

An Experimental Study of the Venous Flap: Investigation of the Recipient Vein

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