Thromboembolic disease is one of the most common serious complications following surgery. Embolism is a major danger facing many hospitalized patients today. The traumatic nature of the surgery, advanced age of the patients, prolonged bed rest and other factors, all contribute to the heightened level of risk. The incidence following major surgery in some groups may be as high as 50%; where multiple contributing factors are present, it may even be as high as 80%. Complicating matters further, is the availability of acceptable, proven effective methods of prophylaxis. Anticoagulant therapy may increase the risk of postoperative bleeding from the wound or other sites.


Deep vein thrombosis (DVT) is a far more common problem than is often realized. More than 2.5 million occur annually in the United States alone. Where due to age, obesity, previous history of thromboembolism or length and type of procedure, certain patients are at a greatly increased risk of developing DVT.

The National Institute of Health Consensus Report indicated effective DVT prophylaxis starts with assessment of patient risk factors, then subsequent selection of appropriate prophylactic regimen. The Vaso Press System offers a safe and effective noninvasive means of preventing DVT.


The Vaso Press System is an external pneumatic compression (EPC) system for the prevention of DVT. Muscles are rendered ineffective as an assist in venous return during surgery. VasoPress functions as a secondary pump to propel the venous blood out of the deep veins while the patient is undergoing surgical procedures. The pump produces automatically timed cycles of compressed air that forces the blood out of the deep veins helping to prevent stasis. A burst of air is delivered to the garment that is wrapped around an extremity. The garments contain a bladder that focuses the compressed air on vascular structures in the leg. Since the effects of anesthesia and immobilization put the surgical patient at risk for thrombosis formation the resultant effect of moving blood out of the deep veins reduces the risk of DVT. A selection of garments is available depending upon the type of surgical procedure and the clinician’s preference.



Surgery changes the normal pathophysiology in the body with regard to both clot formation and fibrinolysis
During surgery the venous system lacks its own mechanism for propelling blood back to the heart
Muscles that normally assist in “pumping” are rendered ineffective, due to the effects of anesthesia
Vaso Press System mimics muscular contraction in the lower extremity to propel venous blood out of the deep veins
The augmentation of the venous blood flow is regarded as an important therapy for the prevention of DVT
Studies have reported the femoral vein blood flow velocity provided by knee-high compression, has significant greater peak velocity flow augmentation than thigh-high devices


Fibrinolytic shutdown occurs during surgery
Begins some time during surgery and may continue three to four days postoperatively
During this time, the risk of clot formation is extremely high
EPC reactivates the fibrinolytic system and reduces the risk of clot formation3


There are a variety of compression systems to choose. The descriptive terminology may be confusing from circumferential to sequential to intermittent to uniform. There are a lack of studies in peer-reviewed journals that definitively demonstrate that one form of compression is more effective than others to prevent DVT

Patient compliance was found to be a considerable factor in the successful effective use of compression systems
Vaso Press is a single chamber uniform compression system that is easily applied to the lower extremity
Garments are manufactured from a soft breathable fabric that reduces heat build-up and increases patient compliance
One pump provides a choice of compression: Thigh Length, Knee High or Foot

Weight: 6.4 pounds
Pressure Range: 40 mmHg (Leg); 80 mmHg (Foot)
Power: 200 ma, 15W
Time: Inflation: 12 seconds (approximate)
Deflation: 48 seconds (approximate)
Indicators: Power ON, Low Pressure and Continuous Pressure
Alarms: Audible, intermittent beep and visible LED light
Voltage: 120V ± 10%, 60 Hz, – Also Available in 220V
Safety: UL, CE, TUV