Search Results
Background: Ultraviolet (UV)-A therapy is a simple, inexpensive, and effective modality for wound healing, with tremendous potential to improve healing and reduce clinical infections in a number of clinical settings. To date, application of UV-A relies on bulky and hard-to-dose lamps that provide inconsistent therapy, thus making it difficult to apply therapy that is appropriate for the patient.
Methods: This study was designed to test the effectiveness of a novel wound therapy device that combines UV-A with traditional negative-pressure wound therapy (NPWT) to promote wound healing. Furthermore, we tested the ability of fiberoptic UV-A delivery to inhibit bacterial proliferation. Finally, we assayed the level of DNA damage that results from UV-A as compared to established UV-C therapies. Wound healing studies were performed in a porcine model using an articulated therapy arm that allows for continued therapy administration over an extended time course. Negative-pressure wound therapy was administered alone or with UV-A fiberoptic therapy for 2 weeks. Dressings were changed twice a week, at which time wound area was assessed.
Results: Data demonstrate that UV-A with NPWT treatment of wounds results in greater healing than NPWT alone. Using the same therapy device, we demonstrate that exposure of Staphylococcus aureus and Pseudomonas aeruginosa to fiberoptic UV-A results in decreased colony area and number of both bacterial strains. Finally, we show that UV-A induces minimal DNA damage in human fibroblasts and no more DNA damage in wound tissue as compare to intact skin.
Conclusions: These data demonstrate that UV-A can decrease bacterial proliferation and promote wound healing when coupled with NPWT.
Ovine Forestomach Matrix in the Surgical Management of Complex Lower-Extremity Soft-Tissue Defects
A Retrospective Multicenter Case Series
Background: Chronic lower-extremity defects may lead to major amputations and have severe consequences on patient quality of life and mortality. Dermal matrices have become part of the reconstructive ladder and are often deployed in these scenarios to quickly build neodermis, especially in volumetric defects over exposed bone and tendon initially, to allow for subsequent closure by means of split-thickness skin grafting (STSG) or secondary intention. Ovine forestomach matrix (OFM) is a decellularized extracellular matrix (ECM) bioscaffold available in both sheet and particulate forms that can be used as a dermal matrix in various soft-tissue reconstruction procedures.
Methods: This retrospective case series evaluated the use of OFM products in the surgical reconstruction of 50 cases (n = 50) comprised of challenging lower-extremity defects from seven healthcare centers. Patient records were reviewed to identify comorbidities, defect cause, defect size, presence of exposed structures, Centers for Disease Control and Prevention contamination score, Wagner grade, OFM graft use, time to 100% granulation tissue, STSG use, overall time to heal, and postoperative complications. The primary study outcomes were time (days) to 100% granulation tissue formation, with secondary outcomes including overall time to wound closure (weeks), STSG take at 1 week, and complications.
Results: The results of this case series demonstrate OFM as a clinically effective treatment in the surgical management of complex lower-extremity soft-tissue defects with exposed structures in patients with multiple comorbidities. One application of OFM products was effective in regenerating well-vascularized neodermis, often in the presence of exposed structures, with a mean time to 100% granulation of 26.0 ± 22.2 days.
Conclusions: These data support the use of OFM as a safe, cost-effective, and clinically effective treatment option for coverage in complex soft-tissue wounds, including exposed vital structures, and to shorten the time to definitive wound closure in complicated patient populations.
Ablative fractional laser is suggested to promote wound healing in diabetic and venous leg ulcers. In this article, we report the treatment outcome of a recalcitrant foot ulceration related to lower leg arteriopathy. A 43-year-old man with typical digital substraction angiographic findings of arteriopathy was admitted to our department after 30 sessions of hyperbaric oxygen therapy. There was heterotopic tissue within the ulcer consistent with osseous metaplasia and mature bone tissue. This tissue was removed with full-field erbium:yttrium-aluminum-garnet laser, and the remaining parts received fractional erbium:yttrium-aluminum-garnet laser for the induction of wound healing. A decrease in ulcer dimensions was achieved by the second month of laser interventions without recurrence in the first-year control.
Malignant melanoma is responsible for more than three-fourths of skin cancer deaths in the United States. Melanomas presenting on acral surfaces are frequently misdiagnosed initially, leading to progression of disease and worse prognosis. This case is presented to reinforce the significance of careful physical examination and early biopsy of atypical ulcerations of the foot.
Maggot Debridement Therapy
A Primer
Treatment of chronic wounds of the lower extremity requires a systematic, multidisciplinary approach as well as flexibility in order to achieve acceptable, consistent short-term and long-term results. Maggots, once considered an obsolete therapeutic modality, can be a useful addition to the armamentarium of the foot and ankle specialist. This article describes the use of maggot debridement therapy for intractable wounds of the lower extremity. (J Am Podiatr Med Assoc 92(7): 398-401, 2002)
Background:
Increasing amounts of diabetes-focused content is being posted to YouTube with little regulation as to the quality of the content. Diabetic education has been shown to reduce the risk of ulceration and amputation. YouTube is a frequently visited site for instructional and demonstrational videos posted by individuals, advertisers, companies, and health-care organizations. We sought to evaluate the usefulness of diabetic foot care video information on YouTube.
Methods:
YouTube was queried using the keyword phrase diabetic foot care. Original videos in English, with audio, less than 10 min long within the first 100 video results were evaluated. Two reviewers classified each video as useful or nonuseful/misleading. A 14-point usefulness criteria checklist was used to further categorize videos as most useful, somewhat useful, or nonuseful/misleading. Video sources were categorized by user type, and additional video metrics were collected.
Results:
Of 87 included videos, 56 (64.4%), were classified as useful and 31 (35.6%) as nonuseful/misleading. A significant difference in the mean length of useful videos vs nonuseful/misleading videos was observed (3.33 versus 1.73 min; P < .0001). There was no significant difference in terms of popularity metrics (likes, views, subscriptions, etc) between useful and nonuseful/misleading videos.
Conclusions:
This study demonstrates that although most diabetic foot care videos on YouTube are useful, many are still nonuseful/misleading. More concerning is the lack of difference in popularity between useful and nonuseful videos. Podiatric physicians should alert patients to possibly misleading information and offer a curated list of videos.
Background:
The aim of this study was to observe the pressure changes in the felt padding used to off-load pressure from the first metatarsal head, the effects obtained by different designs, and the loss of effectiveness over time.
Method:
With a study population of 17 persons, two types of 5-mm semicompressed felt padding were tested: one was C-shaped, with an aperture cutout at the first metatarsophalangeal joint, and the other was U-shaped. Pressures on the sole of the foot were evaluated with a platform pressure measurement system at three time points: before fitting the felt padding, immediately afterward, and 3 days later.
Results:
In terms of decreased mean pressure on the first metatarsal, significant differences were obtained in all of the participants (P < .001). For plantar pressures on the central metatarsals, the differences between all states and time points were significant for the C-shaped padding in both feet (P < .001), but with the U-shaped padding the only significant differences were between no padding and padding and at day 3 (P = .01 and P = .02).
Conclusions:
In healthy individuals, the U-shaped design, with a padding thickness of 5 mm, achieved a more effective and longer-lasting reduction in plantar pressure than the C-shaped design.
Background
Retrograde intramedullary nailing for tibiotalocalcaneal arthrodesis (TTCA) is used for severe hindfoot deformities, end-stage arthritis, and limb salvage. The procedure is technically demanding, with complications such as infection, hardware failure, nonunion, osteomyelitis, and possible limb loss or death. This study reports the outcomes and complications of patients undergoing TTCA with a femoral nail, which is widely available and offers an extensive range of lengths and diameters.
Methods
We performed a retrospective review of 104 patients who underwent 109 TTCAs using a femoral nail as the primary procedure (January 2006 through December 2016). Demographic data, risk factors, and outcomes were evaluated.
Results
At final follow-up, the overall clinical union rate was 89 of 109 (81.7%). Diabetes mellitus was negatively associated with limb salvage (P = .03), and peripheral neuropathy (P = .02) and Charcot's neuroarthropathy (P = .03) were negatively associated with clinical union. Only four patients (3.8%) underwent proximal amputation, at an average of 6.1 months, and 11 patients (10.6%) died, at a mean of 38.0 months. The most common complication was ulceration in 27 of 109 limbs (24.8%), followed by infection in 25 (22.9%). Twenty-three patients (22.1%) underwent revision procedures, at a mean of 9.4 months. Thirteen of these 23 patients (56.5%) had antibiotic cement rod spacers/rods for deep infection–related complications.
Conclusions
Use of a femoral nail has been shown to provide similar outcomes and limb salvage rates compared with other methods of TTCA reported for similar indications in the literature.
Objective
Porcine-derived xenograft biological dressings (PXBDs) are occasionally used to prepare chronic wound beds for definitive closure before split-thickness skin grafts (STSGs). We sought to determine whether PXBD influences rate of STSG take in lower-extremity wounds.
Methods
Lower-extremity wounds treated with STSGs were retrospectively reviewed. Patients were included in one of two groups: wound bed preparation with PXBD before STSG or no preparation. Patients were excluded if they received wound bed preparation via another method. Patient demographics, comorbidities, wound history, wound bed preparation, and 30- and 60-day outcomes were collected.
Results
There was no difference in healing outcomes between the PXBD (n = 27) and no preparation (n = 39) groups. At 30- and 60-day follow-up, percentage of STSG take was not significantly different between groups (77.9% versus 79.0%, P 30 = .818; 82.2% versus 80.9%, P 60 = .422). Mean wound sizes at these follow-up periods were not different (4.4 cm2 versus 5.1 cm2, P 30 = .902; 1.2 cm2 versus 1.1 cm2, P 60 = .689). The PXBD group had a higher mean ± SD hemoglobin A1c level (8.3 ± 3.5 versus 6.9 ± 1.6; P = .074) and age (64.9 ± 12.8 years versus 56.3 ± 11.9 years; P = .007) versus the no preparation group.
Conclusions
Application of PXBDs for wound bed preparation had no effect on wound healing compared with no wound bed preparation. The two groups varied only by mean age and hemoglobin A1c level. The PXBD may be beneficial, but these results call for randomized controlled trials to determine the true impact of PXBDs on wound healing. In addition, PXBDs may have utility outside of clinically oriented outcomes, and future work should address patient-reported outcomes and pain scores with this adjunct.
Contralateral Peak Plantar Pressures with a Postoperative Boot
A Preliminary Study
Background: Frequent use of walking boots in podiatric medicine often elicits patient complaints and sequelae from the imposed limb-length discrepancy. This study was designed primarily to determine whether peak plantar pressures are decreased in the contralateral foot when a moderately worn athletic shoe is worn opposite a high-calf walking boot and, if so, secondarily to determine whether a specialized surgical shoe worn on the contralateral foot can also effectively reduce this pressure. The pressure reductions were then compared to determine whether significantly greater plantar pressure reduction was provided by either the athletic shoe or the surgical shoe.
Methods: Participants without a foot abnormality walked on a treadmill in four footwear combinations: barefoot bilaterally, high-calf rocker-bottom sole (HCRB) walking boot/ barefoot, HCRB walking boot/athletic shoe, and HCRB walking boot/modified walking boot shoe. Measurements were taken with the participants wearing socks. Peak plantar calcaneal pressures were collected.
Results: Peak plantar pressures under the calcaneus opposite the HCRB walking boot were significantly reduced from barefoot pressures when either an athletic shoe or the modified walking boot shoe was worn. However, no significant difference was seen when comparing the reduction by the athletic shoe with that by the modified walking boot.
Conclusions: Wearing an athletic shoe on the foot opposite an HCRB walking boot reduces calcaneal pressures; however, wearing a modified device with structural properties of an HCRB walking boot sole is no better than an athletic shoe at reducing peak calcaneal pressures. (J Am Podiatr Med Assoc 101(2): 127–132, 2011)
