'Intermittent claudication' of the spinal cord was first described by Dejerine in 1911. In 1961, Blau and Logue described an unsual syndrome resulting from central protrusion of a lumbar intervertebral disc which gave rise to symptoms suggesting 'intermittent claudication of the cauda equina'. Since this report, a further series of cases has been described by Evans (1964). We have recently obse...

HYPOTHESIS Intermittent compression therapy for patients with inoperable chronic critical ischemia with rest pain or tissue loss may have beneficial clinical and hemodynamic effects. STUDY DESIGN Case series of 14 consecutive ischemic legs that underwent application of a 3-month treatment protocol during a 2(1/2)-year study. SETTING Veterans Administration Hospital. PATIENTS Thirteen pati...

Reductions in fossil fuel use and increases in system efficiency are required to make space heating more environmentally benign. Ground loop heat pumps offer an alternative heating solution that is more environmentally benign than conventional methods. Past studies of these heat pumps have usually focused on basic system arrangements, but new advanced systems are being developed. Here, energy a...

BACKGROUND There has been recent investigation into the incidence of venous thromboembolism in otolaryngology, but the current utilization of venous thromboembolic (VTE) prophylaxis among practicing otolaryngologists remains largely unknown. METHODS A survey of 26 questions was emailed to 4376 otolaryngologists. RESULTS A total of 4376 surveys were sent and 676 were returned for a response ...

A prototype compressor for application in high temperature compression-resorption heat pumps has been designed, manufactured and tested. The paper presents details of the compressor design together with test results obtained on the pilot heat pump plant with the prototype compressor. The compressor is of the twin-screw type and its stainless steel rotors operate without timing gears. There is n...

We performed a crossover study to evaluate the haemodynamic effect of active dorsal to plantar flexion and seven pneumatic compression devices in ten patients who had a total knee arthroplasty. Using the Acuson 128XP/10 duplex ultrasound unit with a 5MHz linear array probe, we assessed the augmentation of peak venous velocity and venous volume above and below the junction of the greater sapheno...

Configurations derived from classical concepts of waverider and Busemann biplane have great potential of use in aerodynamic design of highspeed vehicles with air-breathing jet engines due to their ability to provide both high lift-to drag ratio and intense preliminary compression of the flow before air intakes. The issues of conceptual design of highspeed vehicles based on the use of waverider ...

Compression foot pumps are widely used for the prevention of postoperative venous thrombosis. We tested the efficiency of the pump in ten healthy subjects; the velocity of venous blood flow in the common femoral vein was measured in the horizontal, Trendelenberg (foot-up) and reverse-Trendelenberg (foot-down) positions. Application of the foot pump produced an increase in the venous velocity in...

This paper presents the development of the low cost liquid pump. The rotary compressor developed as the gas compressor for the residential air-conditioner was converted into the liquid refrigerant pump. Problems of the liquid refrigerant pump are the reliability assessment of sliding parts and the reduction of the noise generated by discharge pulsation in this development. Therefore some modifi...