ABSTRACT
Objective To develop a miniature negative pressure aspirator with easy operation,stable negative pressure,low weight,small volume and high portability.Methods A double-faced printed circuit board with a size of 6 cm×4 cm×1 cm was manufactured with the functions of regulating the current and DC/AC conversion.DC vacuum pump and Panasonic li-ion battery pack were used to generate the desired pressure between-0.017 and-0.060 MPa,and mechanically-driven deformation vacuum gauge was involved in manufacturing the aspirator.Two sizes (150 and 200 ml) of drainage bottles were made of medical silica gel.Results The aspirator facilitated negative-pressure therapy when the patient was walking or discharged,which decreased the hospital cost and stay.Conclusion The aspirator gains advantages in stable negative pressure,low power consumption,easy operation and high safety,and thus is worthy promoting clinically.
ABSTRACT
Objective Negative pressure aspirator clogging ( OSAC) frequently occurs in orthopedic surgery .This study was to investigate the frequency , location , and mechanisms of OSAC in China by analysis of the current status and clinical observation of OSAC so as to provide evidence for the solution of the problem . Methods Using the two-stage random sampling method , we conduc-ted a questionnaire survey on OSAC among 738 clinical orthopedists during the 16th and 17th Chinese Orthopedic Association Confer-ences.Totally, 160 out 1200 orthopedic surgeries were randomly selected in the time order of operation , including 38 cases of total hip arthroplasty ( THA) , 39 cases of total knee arthroplasty ( TKA) , 43 cases of extremity and spinal fractures surgery , and 40 cases of other orthopedic surgeries .We also obtained the satisfaction scores with the existing aspirators from related medical professionals . Results Among the 738 respondents included into the analysis , 706 (95.7%) thought that OSAC often occurred during surgery , 631 (85.5%) considered THA to be the leading cause of OSAC , and 714 (96.7%) regarded the tip and hose joint of the aspirator as the common causes . The mean satisfaction score with the existing aspirators was 7.62 ±0.74.Clinical observation showed the mean frequency of OSAC to be 2.55 ±1.62 in THA, 1.95 ±1.33 in TKA, 1.52 ±1.18 in extremity and spinal fracture surgeries , and 0.95 ± 0.68 in other orthopedic surgeries , and the satisfaction score to be 7.36 ±0.84. Conclusion OSAC has a high incidence rate during orthopedic surgeries in China , thus affecting orthopedic surgery and reducing orthopedists'satisfaction with the aspirators . The current negative pressure aspirator system demands prompt improvement .
ABSTRACT
Negative pressure aspirator is necessary to every clinical sections. Automatic wash of negative pressure aspirator is completed by applying the technology of liquid level induction. This development eases the work intensity of medical care personnel, lowers the medical treatment cost, cuts down the infection probability to medical care personnel in and reduces the failure rate.