Implementing a Wearable Sensor for Lymphedema Garments: A Prospective Study of Training Effectiveness.

Lymphedema garments apply therapeutic pressure to maintain minimum leg volume. Practitioners and patients apply these garments and seek to achieve appropriate compression pressure "by feel." PURPOSE: A study was conducted to assess the feasibility of applying a sensor-feedback device to train staff to accurately apply garments. METHODS: A convenience sample of wound care and rehabilitation staff volunteered for a prospective, randomized, unblinded, single-center pilot study. Participants were randomized to instruction+feedback (ie, receiving training on compression application and using the device to determine whether they achieved desired pressure) or instruction only groups (n = 6 each). Each volunteer applied hook-and-loop closures on the author's leg pre- and post-training with a target of 35 mm Hg, or |Ppre- 35|= |Ppost- 35|=0. (|P| is absolute value of P). The feedback group used a device to measure the applied compression; the device consists of a capacitive sensor of thin polyurethane foam between conductive fabric layers and a microcomputer/Bluetooth transmitter under a vacuum seal that fits into a fabric pocket of a lymphedema garment at the posterior ankle and pairs with a mobile device. A lymphology-certified therapist coordinated training. Data were collected with a pen/paper tool and analyzed with Student's t test. RESULTS: The instruction+feedback group was closer to target after training (|Ppre - 35|= 10 ± 12 mm Hg; |Ppost - 35|=5 ± 4 mm Hg; P <.05; paired t test) than the instruction only group (|Ppre- 35|=19 ± 11 mm Hg; |Ppost - 35|=12 ±12 mm Hg; not significant). CONCLUSION: This wearable mobile pressure sensor device assists practitioners in applying hook-and-loop lymphedema garments closer to target pressure. Larger studies with clinicians and research that involves patient application of compression are warranted.

Hyperbaric oxygen therapy for wound healing and limb salvage: a systematic review.

This article is a systematic review evaluating published clinical evidence of the efficacy of hyperbaric oxygen therapy (HBOT) for wound healing and limb salvage. The data source is the Ovid/Medline database for key word "Hyperbaric Oxygenation" with search limits (human studies, 1978-2008). Results were combined by Boolean AND with 1 of the 3 following searches: (a) wound healing (10 permutations); (b) compromised flap or graft (3); and (c) osteomyelitis (1). The author evaluated 620 citations, of which 64 reported original observational studies and randomized controlled trials (RCTs) on HBOT and healing outcomes. All citations with 5 subjects were selected for full text review (44 articles) and evaluated according to GRADE criteria for high, medium, low, or very low level of evidence. A Cochrane review identified 1 additional study with a low level of evidence. This systematic review discusses and tabulates every article of high or moderate level of evidence. For patients with diabetic foot ulcers (DFU) complicated by surgical infection, HBOT reduces chance of amputation (odds ratio [OR] 0.242, 95% CI: 0.137-0.428) (7 studies) and improves chance of healing (OR 9.992, 95% CI: 3.972-25.132) (6 studies). Positive efficacy corresponds to HBOT-induced hyperoxygenation of at-risk tissue (7 studies) as measured by transcutaneous oximetry. HBOT is associated with remission of about 85% of cases of refractory lower extremity osteomyelitis, but an RCT is lacking to clarify extent of effect. There is a high level of evidence that HBOT reduces risk of amputation in the DFU population by promoting partial and full healing of problem wounds. There is a moderate level of evidence that HBOT promotes healing of arterial ulcers, calciphylactic and refractory vasculitic ulcers, as well as refractory osteomyelitis. There is a low to moderate level of evidence that HBOT promotes successful "take" of compromised flaps and grafts.

Measured improvement in rate of healing of venous ulceration.

This case study describes a pivotal intervention associated with improved wound appearance and healing rate in a young, active woman with extensive venous stasis ulcers. These extensive ulcerations were heavily exudative and covered by a layer of yellow eschar. Yellow eschar and drainage were successfully managed with a capillary dressing (Vacutex), which promoted therapeutic compression as applied by standard dressings. This case provides data in favour of wound care protocols featuring Vacutex, specifically designed to address the consequences that wound drainage and eschar have in dramatically large venous stasis ulcers.

Phase I design and evaluation of an isometric muscle reeducation device for knee osteoarthritis rehabilitation.

Our long-term goal is to improve adherence to a home-based isometric program for rehabilitation of knee osteoarthritis (OA) using a force-biofeedback device (Isopad). Our goal for Phase I was to design and evaluate an Isopad-based program in a supervised clinical setting. Our subjects were five patients with knee OA of Kellgren stage II or greater. A capacitive force sensor was tested for accuracy, repeatability, and durability. An Arthritis Foundation home-based isometric program inspired the Isopad design. The Isopad provided visual and auditory feedback instantaneously and continuously about force generated between the ankles. The five subjects completed a supervised 8-week progressive isometric program using the Isopad. Absolute isolated quadriceps and hamstring torques were quantified with a dynamometer, and patients completed a self-assessment of symptoms (Western Ontario and McMaster Universities Osteoarthritis Index). The capacitive sensor accuracy error averaged 10% and repeatability 4%. Cognitively intact subjects used the Isopad successfully for isometric progressive resistance training. Quadriceps and hamstrings absolute torques increased an average of 30%. Patients reported decreased functional complaints (Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index). All changes were trends. The Isopad helped subjects with knee OA adhere to a supervised isometric program and meet progressive strength targets. The next-generation Isopad will be employed in a home-based program.

More than one way to measure a wound: an overview of tools and techniques.

PURPOSE: To improve clinical practice and the quality of patient care by providing a learning opportunity that enhances the participant's understanding of the tools and techniques available for wound measurement. TARGET AUDIENCE: This CME/CE activity is intended for physicians and nurses with an interest in learning about tools and techniques available for wound measurement. OBJECTIVES: After reading the article and taking the test, the participant will be able to: Identify advantages and disadvantages of various dimensional methods used to measure wounds. Identify advantages and disadvantages of visual and photographic assessment methods. Identify advantages and disadvantages of vascular and pressure assessment methods.

Electrotherapy reoxygenates inframalleolar ischemic wounds on diabetic patients: a case series.

OBJECTIVE: To retrospectively evaluate the ability of high voltage pulsed current (HVPC) to increase microcirculation in critically ischemic wounds (transcutaneous oxygen [TcPO(2)] less than 10 mm Hg) and, as a result, to improve wound healing. DESIGN AND METHODS: Clinical case series with successive adult diabetic subjects (3 men and 3 women) with nonsurgical ischemic malleolar or inframalleolar skin lesions, each subject serving as his or her own control. Wound area and TcPO(2) were measured periodically. Presence of distal arteriosclerosis was assessed on 5 patients by 2-dimensional, time-of-flight magnetic resonance angiography. End point was either complete wound closure or leg amputation. RESULTS: Maximum mean TcPO(2) was 2 +/- 2 mm Hg at the wound edge before the start of electrotherapy. After electrotherapy began, maximum TcPO(2) was 33 +/- 18 mm Hg (N=6; P<.05, Wilcoxon signed rank test). After treatment with HVPC, 4 patients' wounds healed and 2 patients underwent amputation. As expected, healed patients initially deteriorated after the start of treatment, but their wounds began healing when the perilesion TcPO(2) measurement exceeded 20 mm Hg. Thereafter, the wounds closed at a predictable rate. Complete closure occurred for patients who had a relatively low atherosclerotic burden. CONCLUSION: The results of this clinical case series suggest that electrotherapy can improve periwound microcirculation of ischemic inframalleolar skin lesions.