Biomedical subjects

L J Pavlovich

Publications and source records attributed to L J Pavlovich.

7 recordsLinked to original sources

PubMed1999

Arthroscopic versus open distal clavicle resection: a biomechanical analysis on a cadaveric model.

A fresh cadaver shoulder model was used to evaluate the difference in joint laxity between arthroscopic and open distal clavicle resection procedures. Twelve shoulders were mounted in a load frame that allowed compressive loading of the distal clavicle into the acromion. Specimens were loaded to 100 N (20 N/sec) while load and deformation data were recorded for three conditions: (1) intact, (2) 5-mm closed resection, and (3) 10-mm open resection. The displacement at the 100-N load and the stiffness of the load/displacement curves were compared for the intact, arthroscopic, and open procedures. Significant differences (ANOVA, P< or =.05) in displacement and stiffness were observed between the intact joint and both surgically resected joints. No significant differences were observed between the two surgically resected joints. The amount of bone removed arthroscopically was sufficient to prevent further bony contact in the axially loaded acromioclavicular joint.

Acromioclavicular Joint↗

PubMed1993

Biomechanical performance of new vascular sutures and needles for use in polytetrafluoroethylene grafts.

Two new cardiovascular monofilament sutures attached to taper point needles have been developed for use in expanded polytetrafluoroethylene (PTFE) grafts. One monofilament suture made of PTFE has a microporous structure that allows it to be channel swaged to a needle that closely approximates its suture diameter. The other suture is a monofilament polypropylene suture that has been extruded to produce a tapered swage end, which was significantly smaller than that of the remainder of the suture in order to be channel swaged to smaller diameter needles. On the basis of comprehensive biomechanical performances, the performance of the new needle suture products with needle/suture diameter ratios approaching 1:1 was superior to needle suture products with 2:1 needle/suture diameter ratios for use in PTFE vascular grafts, regardless of the suture material.

Blood Vessel Prosthesis↗

PubMed1993

A synthetic membrane for testing needle penetration.

Needle performance is primarily judged by its penetration through tissue. For detailed studies of needle performance, tissue is too heterogeneous and unstable and difficult to obtain. A homogeneous, stable, and readily available polyurethane substrate has been evaluated as a suitable alternative to biological tissue for evaluation of needle penetration. The needle penetration profiles through the synthetic substrate correlated very well with those through natural tissue. In addition, the synthetic substrate was sensitive enough to easily detect a 20% increase in the force necessary to penetrate natural tissue. This polyurethane substrate offers a valid alternative to biological tissue for the testing of needle penetration performance.

Animals↗

PubMedDate not supplied

New, innovative packaging system for surgical sutures and needles.

A new, innovative packaging system for surgical needles and sutures has been developed that meets the special needs of emergency physicians, surgeons, and operating personnel. This packaging system consists of an overwrap, or breather pouch, as well as an innerwrap containing the needle swaged to a surgical suture. The flaps of the overwrap are offset and serrated to facilitate the opening and sterile transfer of the inner packet to the sterile field. The inner packet contains either a plastic labyrinth or craft board that maintains the suture as straight as possible until knot construction. The needle swaged to a suture is parked in foam to protect its sharp cutting edges and point.

Emergency Service, Hospital↗

PubMedDate not supplied

Considerations in the selection of surgical gloves for tape wound closure.

One of the reasons that tape closure of wounds is rarely used in the emergency department is that it is difficult for the emergency physician wearing powdered, latex gloves to handle skin closure tapes. Because the skin closure tapes adhere aggressively to powdered latex gloves, it is difficult for the emergency physician to separate the tape from his glove and apply the tape to the skin. The advent of a new powder free glove allows the emergency physician to handle the tapes and accomplish tape wound closure.

Adhesiveness↗

PubMedDate not supplied

Ease of donning surgical gloves: an important consideration in glove selection.

It is a commonly held belief among physicians that powder free surgical gloves are more difficult to don than cornstarch powdered gloves. This difficulty is supposedly enhanced when the physician's hands are wet, a situation commonly encountered when regloving during surgical procedures. This investigation dispels these beliefs by demonstrating that the forces required to don powder free gloves do not differ significantly from those required to don gloves coated in cornstarch lubricant. Moreover, Biogel, a new powder free glove with an inner hydrogel lining, is shown to don easily and safely without ripping, even with wet hands, a circumstance not encountered with other gloves.

Emergency Medicine↗

PubMedDate not supplied

Design of hydrotherapy exercise pools.

Several hydrotherapy pools have been designed specifically for a variety of aquatic exercise. Aqua-Ark positions the exerciser in the center of the pool for deep-water exercise. Aqua-Trex is a shallow underwater treadmill system for water walking or jogging. Swim-Ex generates an adjustable laminar flow that permits swimming without turning. Musculoskeletal conditioning can be accomplished in the above-ground Arjo shallow-water exercise pool. A hydrotherapy pool also can be custom designed for musculoskeletal conditioning in its shallow part and cardiovascular conditioning in a deeper portion of the pool. Regardless of the type of exercise, there is general agreement that the specific exercise conducted in water requires significantly more energy expenditure than when the same exercise is performed on land.

Equipment Design↗