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Up to now, there is no widely accepted assessment of surgical skills. Nowadays, an objective structured clinical examination (OSCE) has been proposed as a modern type of examination often used in medicine to test skills. The assessment of skills is realized by practical exams, in which students are evaluated by experienced examiner using a check list. However, the examiner lacks of information which...
We have developed a near-infrared, MR, hyperspectral imaging system, and utilized it to help clinicians monitor the recovery of lower limb amputations toward reducing the risk of amputation failure. The system illuminates the amputation area with a cold broadband light source, collects a series of spectroscopic images that are deconvoluted using chemometric methods for imaging the spatial distribution...
It is believed that the exogenous electrical stimulation via improving the natural endogenous bioelectric current, accelerate the wound healing. Up to now, this hypotheses has not been researched in acute surgically wounds. Thirty-nine male guinea pigs were randomly divided into one control and two experimental groups (DC anodal group and DC cathodal group). A full thickness skin incision, length...
This paper is concerned with the 3D modeling of skin wound using uncalibrated vision techniques for the volumetric assessment of the healing process. We have developed an original approach for matching two color images captured with a free-handled digital camera and generate a semi-dense 3D model. We evaluate the precision of the inferred 3D model by registration to a ground truth on artificial wounds...
Summary form only given. A method called electroporation has been used for decades to introduce drugs or DNA into cells for basic science or for therapeutic purposes. Pulse durations for electroporation range from milliseconds to microseconds. Another domain of pulsed electric field interactions with cell structures and functions opens when the pulse duration is reduced to values below the characteristic...
A microneedle array has been fabricated and applied to the measurement of transdermal skin potentials in human subjects. Potential changes were recorded in the vicinity of superficial wounds, confirming the generation of a lateral electric field in human skin. The measured electric field decays with distance from the wound edge, and is directed towards the wound. The measurement of endogenous fields...
Pressure ulcers are widely considered to be a critical problem in rehabilitation since they result in severe discomfort and high healthcare cost. The prevention of pressure ulcers is a constant preoccupation for every nursing team. This paper introduces a novel handheld instrument that can detect subtle changes in the skin biomechanical properties by measuring its biomechanical response. This could...
Pressure ulcers are widely considered to be a critical problem in rehabilitation since they result in severe discomfort and high healthcare cost. The prevention of pressure ulcers is a constant preoccupation for every nursing team. This paper introduces a novel handheld instrument that can detect subtle changes in the skin biomechanical properties by measuring its biomechanical response. This could...
Tissue injury and its ensuing healing process cause scar formation. In addition to physical disability, the subsequent disfigurements from burns often bring negative psychological impacts on the survivors. Scar hypertrophy and contracture limit the joint motion and body function of the patient. With fast development of the current available technologies regarding the scar therapies, not only the process...
A microneedle array has been fabricated and applied to the measurement of transdermal skin potentials in human subjects. Potential changes were recorded in the vicinity of superficial wounds, confirming the generation of a lateral electric field in human skin. The measured electric field decays with distance from the wound edge, and is directed towards the wound. The measurement of endogenous fields...
Tissue injury and its ensuing healing process cause scar formation. In addition to physical disability, the subsequent disfigurements from burns often bring negative psychological impacts on the survivors. Scar hypertrophy and contracture limit the joint motion and body function of the patient. With fast development of the current available technologies regarding the scar therapies, not only the process...
The action of electrical currents on living tissues has been a subject of fascination since the early descriptions of electrical currents. Electricity has been documented as a control system in organ function in the heart and nervous system. In tissues electrical potentials have been documented, particularly in healing wounds. A skin battery potential has been described and electrical currents have...
Male Fischer rats were given a full thickness, dorsal midline wound with a scalpel, and the wound was closed with 9-mm clips at 1-cm intervals. At postoperative day 14 the rats were sacrificed and wound-breaking strengths (WBS) for various strain rates were determined. The results demonstrated a dramatic dependence of WBS on strain rate.<<ETX>>
A percutaneously indwelling intramuscular electrode was developed for controlling paralyzed upper and lower extremities by functional electrical stimulation (FES). The electrode was made of a 19-strand rope wound from ultrafine (25- mu m-diameter) SUS 316L stainless steel wires. Because of low percentages of electrode breakage and migration in the body, stable and reliable stimulation of paralyzed...
A novel simulation method for planning a skin wound suture is proposed according to the principles of biogeometry, using a finite-element approach. The skin mesh program (CASMeD II) is used to select the suture axis and to determine the minimal distribution of the tension forces on the suture points of the suture line. The damping effect of the continuum of the skin, quantified by the calculated relative...
It is known that in living tissue a current surrounding an injury arises as a result of the tissue damage. Such currents are the result of the disruption of the cellular membrane integrity which permits the chemical milieu to be altered as the ionic content of the cell spills out into the extracellular fluid.1 It has been postulated that this bioelectric current contributes in some manner to the process...
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