Influence of popliteal vein thrombosis on subsequent ambulatory venous function measured by near-infrared spectroscopy

Hosoi, Y; Yasuhara, Hiroshi; Shigematsu, Hiroshi; Komiyama, Takashi; Onozuka, Atsuko; Muto, Tetsuichiro

doi:10.1016/s0002-9610(98)00314-6

Cited by 31 publications

(18 citation statements)

References 23 publications

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“…However, changes in Oxy-Hb and TotalHb levels were not observed. Given that a significant decrease in Deoxy-Hb is indicative of an increase in venous return 13) , these results show that although tilt configured between 5 and 20 degrees did not significantly influence the levels of venous return in the lower limbs, full-tilt reclining had a large affect on this process. Combining the results of this study and our previous study, it becomes clear that if a tilt mechanism is used in isolation, it is necessary to configure the tilt to 30 degrees, however if both the tilt and reclining mechanisms are combined, it is possible to increase venous return at 20 degrees of tilt.…”

Section: Discussionmentioning

confidence: 67%

Using Seating Techniques as a Preventative Measure against Lower Limb Edema -The Effect of Combining Tilt Angle and Reclining Mechanisms on Wheelchairs

et al. 2010

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Abstract.[Purpose] The purpose of this study was to evaluate the effects of wheel chair tilt systems on lower limb hemodynamic states and their relationship to mechanical factors using near-infrared spectroscopy and a pressure distribution measuring system. [Subjects] Twelve healthy adult volunteers participated in this study. [Methods] We measured the lower limb hemodynamic states and pressure distribution experienced in a wheelchair in four tilt-conditions: reclining by five degrees, ten degrees, twenty degrees and full tilt-reclining.[Results] The results show a significant decrease in Deoxy-Hb was induced in the full-tilt reclining position. Furthermore, in comparison with the other sitting positions, fulltilt reclining produced a decrease in contact area, especially in the posterior femoral region. [Conclusion] These results suggest wheelchairs that combine tilt and reclining capabilities can, by altering the sitting position and thus improving lower limb hemodynamic states, prevent venous edema in wheelchair users who cannot perform active muscular pumping.

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Section: Discussionmentioning

confidence: 67%

Using Seating Techniques as a Preventative Measure against Lower Limb Edema -The Effect of Combining Tilt Angle and Reclining Mechanisms on Wheelchairs

et al. 2010

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“…According to Hosoi [9] and Oyama [10], deOXY-Hb is assumed to be associated with outflow of venous blood for internal respiration in a body organ such as the lower leg. In addition, we interpreted OXY-Hb is assumed to be associated with inflow of arterial blood.…”

Section: Measurement Of Blood Flow By Nirsmentioning

confidence: 99%

“…Because the participants lay supine before sitting on the high stool and raising the body, the blood flowed into the lower extremities secondary to the gravity effect, and the total blood flow in the lower leg thus increased. Under the interpretation of deOXY-Hb as outflow of venous blood [9,10] in internal respiration, the outflow of deOXY-Hb was impeded. Figure 7 shows the results of blood flow at a footrest angle of 30° while sitting on the trial chair.…”

Section: Blood Flowmentioning

confidence: 99%

Effect of Footrest Angle on Decrement of Leg Swelling while Sitting

Yamaguchi

Yoshida

Kamijo

et al. 2014

IJAE

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Sitting in the comfort of chairs is an important factor of daily life, but leg swelling results in languor of lower legs and decreases sitting comfort. Many studies have examined the mechanism of increased leg swelling; however, few have investigated the mechanism of decrease leg swelling. We studied the effect of the footrest angle on decreases in leg swelling by measuring leg swelling with bioelectrical impedance method (BI method) and blood flow with near-infrared spectroscopy (NIRS). We performed the sitting experiment with six volunteers. It comprised three parts; (1) lying supine for 20 minutes to alleviate leg swelling, (2) sitting on a high stool for 30 minutes to increase leg swelling, (3) sitting on a trial chair with a footrest for 30 minutes to decrease leg swelling in order to research the differences among three footrest angles (0°, 15°, and 30°). By the results of the BI method, leg swelling increased by sitting on the high stool and decreased by sitting on the trial chair with a 30° footrest. By the results of NIRS, the quantity of deoxygenated hemoglobin (deOXY-Hb) increased by sitting on the high stool and the quantity of oxygenated hemoglobin (OXY-Hb) increased by sitting on the trial chair. In comparison of leg swelling and blood flow, it is considered that increases in deOXY-Hb influences gains in leg swelling, and increases in OXY-Hb influences reductions in leg swelling.

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“…[7][8][9][10] On the other hand, several investigators have attempted to define the severity of chronic venous insufficiency by measuring changes in HHb, and concluded that NIRS might be useful for the assessment of ambulatory venous function in patients with primary valvular insufficiency and for predicting post-thrombotic syndrome in the early phase of DVT. [11][12][13][14][15][16] While high-risk groups for VTE can be identified, it is not possible to predict which individual patients in a given risk category will develop a clinically significant thromboembolic event. The primary purpose of the present study was to evaluate predictors of postoperative DVT, including baseline characteristics at initial presentation as well as preoperative variables, using noninvasive examination, and to determine the prognostic impact of these parameters on the development of postoperative DVT.…”

mentioning

confidence: 99%

Deep vein thrombosis after total knee or hip arthroplasty is associated with increased preoperative calf muscle deoxygenation as measured by near-infrared spectroscopy

Yamaki

Hamahata

Fujisawa

et al. 2011

Journal of Vascular Surgery

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Influence of popliteal vein thrombosis on subsequent ambulatory venous function measured by near-infrared spectroscopy

Cited by 31 publications

References 23 publications

Using Seating Techniques as a Preventative Measure against Lower Limb Edema -The Effect of Combining Tilt Angle and Reclining Mechanisms on Wheelchairs

Using Seating Techniques as a Preventative Measure against Lower Limb Edema -The Effect of Combining Tilt Angle and Reclining Mechanisms on Wheelchairs

Effect of Footrest Angle on Decrement of Leg Swelling while Sitting

Deep vein thrombosis after total knee or hip arthroplasty is associated with increased preoperative calf muscle deoxygenation as measured by near-infrared spectroscopy

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