Effects of a microprocessor-controlled ankle-foot unit on energy expenditure, quality of life, and postural stability in persons with transtibial amputation: An unblinded, randomized, controlled, cross-over study.

Background: Microprocessor-controlled prostheses are designed to improve mobility and quality of life through better balance and energy restoration in persons with transtibial amputation. Quasi-active microprocessor-controlled ankles (MPA) adapt to variable terrain by ankle angle adjustment.

Objectives: To compare energy expenditure, balance, quality of life, and satisfaction of Proprio-foot® (a quasi-active MPA model) with standard prescribed ankle prosthesis (prescribed ankle-foot units [PA]) (standard energy storage and return prosthesis).

Ankle brachial index is equally predictive of exercise-induced limb ischemia in diabetic and non-diabetic patients with walking limitation.

Background: In diabetic patients, arterial stiffness may impair compressibility of vessels and result in higher ankle to brachial index (ABI) than in non-diabetic subjects.

Methods: We studied 1972 non-diabetic and 601 diabetic patients, with suspected peripheral artery disease, Exercise transcutaneous oxygen pressure (Ex-tcpO2), expressed in DROP index (limb tcpO2 change minus chest tcpO2 change), is insensitive to arterial stiffness and can estimate exercise-induced regional blood flow impairment (RBFI). A minimal DROP <-15 mm Hg indicates the presence of RBFI (positive test).

Transcutaneous Exercise Oximetry for Patients With Claudication - A Retrospective Review of Approximately 5,000 Consecutive Tests Over 15 Years.

Background: Exercise transcutaneous oximetry (Ex-tcPO2) is used to argue for the vascular origin of lower limb pain, especially at the proximal level, where the diagnosis of peripheral artery disease can be difficult. This study analyzed the principal indications, mean results, and limitations of Ex-tcPO2, as well as the relationship between the annual number of Ex-tcPO2 tests and internal iliac artery (IIA) revascularizations.

Methods and results: Data from our first 15 years' experience (3,631 patients, 5,080 tests) with Ex-tcPO2 were analyzed retrospectively using the minimal value of the decrease from rest of oxygen pressure (DROP).

Simultaneous pain intensity rating and quantification of ischemia throughout exercise and recovery in proximal versus distal arterial claudication.

Data on simultaneous hemodynamic changes and pain rating estimation in arterial claudication while walking are lacking. This study was conducted to determine if a difference in transcutaneous oxygen pressure (tc pO2) exists between proximal and distal localization at pain appearance (PAINapp), maximal pain (PAINmax) and pain relief (PAINrel) in proximal or distal claudication and if a relationship exists between tc pO2 changes and pain intensity. We analyzed the pain rating (Visual Analog Scale (VAS)) to lower limb ischemia, measured with the decrease from rest of oxygen pressure (DROP) tc pO2 index during constant-load treadmill tests in patients with calf ( n = 41) or buttock ( n = 19) claudication.

Exercise Transcutaneous Oximetry of the Buttocks - External Validation With Computed Tomography Angiography.

Background: Exercise transcutaneous oximetry (Ex-tcPO2) is a non-invasive test for exercise-induced buttock ischemia. Prior study defined Ex-tcPO2 normal/abnormal cut-offs against arteriography but no external validation was available. The aims of this study were therefore to (1) determine the diagnostic performance of Ex-tcPO2 against CTA; (2) determine the cut-off point for detection of stenosis >75% in arteries toward the hypogastric circulation; and (3) determine the effect of chest profile classification on the diagnostic performance of Ex-tcPO2.

Multiprobe devices for exercise transcutaneous oxymetry in patients complaining claudication: interest and limits of unusual probe positions.

Background: Exercise transcutaneous oximetry (PtcO2) can argue for a vascular origin of exercise-related pain in atypical unusual localizations, such as lumbar, thigh or foot pain. We used five probes as a standard for treadmill PtcO2 tests. Recent commercially available devices now include up to eight probes.

High prevalence of known and unknown pulmonary diseases in patients with claudication during exercise oximetry: A retrospective analysis.

The prevalence of pulmonary disease in patients with peripheral artery disease (PAD) has not been extensively studied. Recent evidence has shown that ∼20% of the patients have an atypical chest transcutaneous oxygen pressure (TcpO2) pattern during exercise, which suggests walking-induced hypoxemia. The main objectives of this study were to: (1) describe in a retrospective way the characteristics of the patients suffering from claudication, who attended a treadmill testing in our laboratory, (2) assess the prevalence of known or unknown pulmonary disease.

Comparison of two devices for measuring exercise transcutaneous oxygen pressures in patients with claudication.

Background: We aimed at estimating the agreement between the Medicap" (photo-optical) and Radiometer• (electrochemical) sensors during exercise transcutaneous oxygen pressure ( tcp02) tests. Our hypothesis was that although absolute starting values (tcp02rest: mean over 2 minutes) might)e different, tcpOTchanges over time and the minimal value of the decrease from rest of oxygen pressure (DROPmin) results at exercise shall be concordant between the two systems. taneously, one of each system on the chest, on each buttock and on each calf.

Time and reliability issues associated with automatic vs. manual measurements of Ankle to Brachial pressure Index (ABI) following heavy load exercise.

Objectives: Ankle to brachial index after heavy load exercise is the most accurate way of diagnosing minor arterial lesions in athletes, such as endofibrosis. The reliability and practical aspects of ankle to brachial index measurements after heavy-load exercise have not been studied. The purpose of this study was to analyze the interest of oscillometric automatic vs.