The use of fetal bovine collagen on chronic wounds increases limb salvage: a single-center retrospective analysis.

OBJECTIVE: As part of a quality assurance project at a large tertiary care surgical program in New York City, the effect of debridement, negative pressure wound therapy, and cellular- and tissue-based products (CTPs) on limb salvage was evaluated based on the following outcomes: freedom from amputation, wound closure, and freedom from readmission. Fetal bovine collagen was among the CTPs evaluated. MATERIALS AND METHODS: The data used in this study were derived from a database of all patients who had undergone procedures involving placement of a dermal matrix at the center over a 2.5-year period (January 2016-June 2018). This retrospective analysis included 256 patients who underwent debridement and/or placement of a CTP as part of the treatment course for chronic wounds. RESULTS: Of the 252 patients identified, 34 required either minor or major all-cause amputation from the initial wound intervention, whereas for 218 patients, there were no recorded amputations through the end of the study period after the initial wound intervention. When fetal bovine collagen was evaluated as an explanatory variable to the presence of future amputation, a statistically significant relationship between the variables was found. CONCLUSIONS: The results of the current data analysis indicate that a treatment algorithm that includes appropriate antibiotic therapy, tangential hydrosurgery, application of fetal bovine collagen, and a short course of negative pressure wound therapy may be a more favorable option to achieve limb salvage, freedom from readmission, and wound closure.

Knowledge and Awareness about Cervical Cancer and Human Papillomavirus among Women Living in Macon County, Alabama.

In Alabama, despite the high screening rates for cervical cancer in Blacks, they still have higher mortality rates compared to Whites. Our objective was to increase knowledge and awareness of cervical cancer with the intention to encourage more women to have Pap tests, Human Papillomavirus (HPV) tests and HPV vaccinations after a short-term educational-based intervention. Pre and post questionnaires were administered to collect data before and after a primary educational intervention in Macon County was taught by a team of experts in the subject area. Descriptive statistics were done using SAS software to generate frequency and chi-square tests. Out of the 100 participants: 9% had cervical cancer; 86% were Blacks; about 65% were over the age of 35 and earned less than $50,000/year; 62% lived in the Tuskegee community; 34% were students, staff or faculty of Tuskegee University; about 25% were either married or living with their partner; leaving about 75% of the women as single, divorced or widowed; and more than 80% were students between their first year of college and graduate school with only 40% working for pay. The short-term educational intervention increased participants' knowledge of: who knew what cervical cancer was; ever heard of HPV; and ever had an HPV-test by margins of 9%, 23% and 4% respectively. Participants who had ever heard of Pap test had the same knowledge of 97% before and after the intervention. There was a significant knowledge level increased: in understanding that cervical cancer was caused by 38% HPV infection; 39% of all HPV infections lead to cervical cancer; and cervical cancer has decreased in recent years by 50%. Significant differences were observed only among participants who had ever heard of Pap test before and after the educational intervention with p-values of 0.004 and 0.03 respectively, compared to participants who knew what cervical cancer was and who had ever heard of HPV test. Although some participants lacked knowledge in certain areas, this study showed an apparent increase in their knowledge and awareness following the educational intervention.

Sex-based differences in loss of independence after lower extremity bypass surgery.

INTRODUCTION: This study analyzes sex-based differences in the risk of discharge to a nonhome facility (loss of independence) after lower extremity revascularization and resultant outcomes. METHODS: Data from the NSQIP database for years 2015-2017 was utilized to assess sex-based differences in loss of independence and associated unplanned readmission and 30-day amputation using chi-square, student t-test, and multivariate logistic regression analyses where appropriate. RESULTS: There was increased loss of independence in women (34.9% vs. 26.1 %, p < .01) and associated increase in unplanned readmission (18.4% vs. 13.6 %, p = .01) and length of stay (12.1 days vs 6.5 days, p < .01). Endovascular revascularization was associated with decreased likelihood of loss of independence (OR 0.43, CI 0.36-0.50). CONCLUSION: Loss of independence after lower extremity bypass surgery affects women more than men and it is associated with worse postoperative outcomes.

Venous leg ulcers: potential algorithms of care.

Management of VLUs can be challenging, depending on wound complexity, and may require the use of several treatment modalities to achieve complete wound closure or significant wound area reduction. This review presents a systematic approach to management of VLUs based on previous literature and the authors' clinical experience, with consideration given to wound size, etiology, and responses to prior treatment. Techniques described include debridement (autolytic, enzymatic, sharp/surgical), compression therapy, physical therapy, medical adjuncts, and cellular- and tissue-based therapy. The algorithm of care for VLUs is multimodal. Appropriate diagnostic studies must be performed, including venous duplex and appropriate pathophysiology to confirm the diagnosis of VLU. After the correct diagnosis is confirmed, appropriate treatment may commence. All patients should undergo appropriate wound debridement; the exact modality used is dependent on wound characteristics. Patients must also adhere to consistent compression therapy. Any underlying venous disease that is amenable to surgical intervention should be addressed. Treatment with a medical adjunct and physical therapy are recommended. For patients who do not achieve significant wound area reduction, the addition of CTP is recommended. Use of these methods should result in substantial wound area reduction and/or wound closure.

The Use of Cellular- and/or Tissue-Based Therapy for the Management of Pyoderma Gangrenosum: A Case Series and Review of the Literature.

Pyoderma gangrenosum (PG) is an uncommon inflammatory neutrophilic disorder with a spectrum of clinical presentations with variable courses. Most cases are associated with an autoimmune disorder and manifest in middle-aged adults as a painful lesion that progresses to painful necrotizing ulcers of the lower extremity. Owing to its variability, clinical diagnosis remains difficult and many patients are often misdiagnosed, with resulting delay in treatment. While early immunosuppressant therapy is key to preventing progression of PG, surgical treatment has been met with criticism because of the risk of potentiating pathergy, an exaggerated skin reaction due to trauma. This article presents a case series in which 3 patients with PG lesions underwent different treatment methods, including surgical debridement and use of fetal bovine dermis (FBD). The use of FBD in conjunction with medical treatment provided pain relief and wound coverage as well as encouraged growth of granulation tissue and long-term stability. Commercial cellular and tissue-based products used to aid in accelerating PG wound closure are also reviewed.

Effect of Topical Oxygen Therapy on Chronic Wounds.

Over the past three decades, there has been a growing interest in the use of oxygen therapy to promote wound healing. Although the most commonly recognized oxygen therapy for the treatment of chronic wounds is hyperbaric oxygen therapy, topical oxygen therapy has a greater level of evidence supporting its use in chronic wound care. Still, it is imperative that these two treatment modalities be recognized not merely as competitors, but as distinct therapeutic entities. Through personal experience and a thorough literature review, we investigated the use of topical oxygen therapy in the management of chronic wounds. The benefits of using topical oxygen therapy have been demonstrated in patients with diabetic foot ulcers, ischemic ulcers, post-revascularization ulcers, and pressure ulcers. There are several topical oxygen devices currently on the market that are versatile, relatively low-risk, and generally well-tolerated by patients. While these devices have been used in the treatment of chronic wounds at different locations and of different etiologies, other uses of these devices are still being investigated. Topical oxygen therapy is yet another tool in our arsenal to be used in treating difficult to heal chronic wounds and could potentially be used more readily.

Hydrosurgical Debridement Use Associated With Decreased Surgical Site-Related Readmissions: A Retrospective Analysis.

INTRODUCTION: Debridement is the cornerstone of wound care management. It allows for the removal of fibrinous and necrotic debris from the wound bed as well as the reduction of bacterial bioburden, thus allowing for proper granulation and wound healing. Hydrosurgical debridement uses a controlled, high-pressure fluid jet to cut and remove necrotic debris, contaminants, and bacteria, thereby facilitating a potentially more aggressive debridement. OBJECTIVE: The efficacy of this system was compared with that of other methods of debridement in reducing readmissions due to surgical site infections (SSIs). MATERIALS AND METHODS: Two Current Procedural Terminology codes were used to identify 289 unique patients treated for lower extremity wounds. All patients were treated at a vascular surgery service in a large tertiary care wound program from January 2016 to June 2018. Chart review on wound management was performed. A total of 190 of the 289 patients underwent wound debridement over the course of treatment. Logistic regression was calculated with subsequent SSI admission as the dependent variable. RESULTS: On assessing readmissions owing to SSI following debridement, use of hydrosurgical debridement was found to be associated with decreased SSI admissions (odds ratio, 0.31; 95% CI, 0.142-0.677; P < .05). This finding was compared with the results of either standard sharp soft tissue excisional debridement or the use of pulse irrigation. CONCLUSIONS: There are multiple options to consider when formulating an approach for wound management, including the method of debridement used. One goal of debridement is to decrease the bacterial bioburden in the wound bed to both encourage better wound healing and decrease the rate of wound infections. The present study found that the use of hydrosurgical debridement was associated with decreased SSI readmissions, which could potentially result in better wound care for the patient and possibly decreased health care costs because of a lower rate of readmissions. Further investigation of these 2 potential outcomes is necessary.

The Role of Intermittent Pneumatic Compression in the Treatment of Lower Extremity Chronic Wounds.

Intermittent pneumatic compression devices (IPC) are often used as noninvasive adjuncts in patients with lymphedema, and more recently with venous stasis disease, to promote flow and reduce the adverse effects of interstitial edema associated with both disorders. We will be focusing on lower extremity wounds associated with venous and/or lymphatic disease, the combination often referred to as "lymphophlebitic" disease, and the treatment effect of IPC on this disease process and its sequelae. The function and purpose of pneumatic compression is closely examined along with a variety of pneumatic compression devices that currently exist in the market. A thorough review of the literature was conducted to evaluate the utility of intermittent pneumatic compression in the treatment of lower extremity venous stasis ulcers. Additionally, the author describes personal experience with the use of pneumatic compression on 10 patients with venous stasis ulcers at a single center. There is significant data supporting the use of IPC in patients with lymphophlebitic disease. Overall, ideal patient selection may be crucial. Previous data has shown that patients with high body mass index (>33 kg/m2) and poor functional status (walking less than 200m a day) are related to poor ulcer healing. Therefore, a study that looks primarily at this group (as our small quality assurance [QA] project did) may show increased benefit in this population. It is clear that IPC is of benefit to some patient cohorts with lymphophlebitic disease. This advanced therapy would help patients who have failure of their calf muscle pump and an inability to improve it through other means. However, it is only part of an algorithm that includes: direct wound bed management, moisture control, possible primary venous disease intervention, physical therapy, weight loss, and improved nutrition.

Cryopreserved Allograft Use in Vascular Surgery.

In vascular surgery, bypass procedures are standard treatments for many arterial and venous diseases. The choice of conduit for the bypass operation is fundamental in planning for the appropriate intervention for each individual patient. Although an autogenous conduit is superior, this option is not available in many patients, and prosthetic grafts have been the preferred conduit in a variety of clinical situations. However, since prosthetic graft infections are seen in all realms of vascular surgery, from arteriovenous access to aortic graft infections and lower-extremity bypass infections, cryopreserved arterial and venous allografts, which are relatively resistant to infection, have become the conduit of choice. This discussion will focus on the clinical applications of cryopreserved allografts in vascular surgery, specifically lower-extremity peripheral bypass, aortic disease, and dialysis access.

The Impact of Race and Geographical Location on the Treatment Options of Cervical Cancer in Black and White Women Living in the State of Alabama.

This study assesses the association between age, race, geographical-location, stage, and treatments of Cervical Cancer (CerCancer) in Black and White women, living in Alabama. Data from 2004-2013 was provided by the Alabama Cancer Registry. To perform Chi-square and logistic regression tests, SAS-software was used for analysis. In urban counties, Blacks 40-49 years old diagnosed with localized stage of CerCancer were the most likely to receive surgery (74.14%; P < .0001), followed by Whites 17-39 years old diagnosed with regional stage, were the most likely to receive radiation and surgery-radiation sequence (66.32 and 66.67%; P < .0001) respectively. Also, Whites 50 years and older diagnosed with regional stage were the most likely to receive chemotherapy (65.87%; P < .0001). In rural counties, Blacks 40-49 years old diagnosed with regional stage were the most likely to receive radiation (70.37%) and chemotherapy (83.33%) with P = .005 and .003 respectively, followed by Whites 17-39 years old diagnosed with localized stage were the most likely to receive surgery (76.81%; P < .0001). Adjusting for age, stage and county, Blacks had 1.12 (95% CI = .88-1.42) times the odds of receiving more radiation treatment. Blacks had .76 times adjusted odds (95% CI .59-.99) of receiving less surgery compared to Whites. Treatment disparities exist between Blacks and Whites in Alabama.

Disparities in Cervical Cancer Treatment Options between African American (Black) and White Women in Alabama.

There are disparities in cervical cancer treatment options between African American (Black) and White women in Alabama. The objective of this study was to identify and assess factors contributing to the prevailing inequalities in cervical cancer treatment options between Blacks and Whites, who are living in urban, rural Black Belt (BB), and other rural counties of Alabama. The data of our study population, which was comprised of 2,124 cases of cervical cancer in women 17 years and older, were extracted from the 2004 to 2013 dataset of the Alabama Department of Public Health (ADPH) Cancer Registry. For the analysis of frequency distributions, chi-square, and logistic regression tests SAS software was used. Racial disparities in cervical cancer treatment options for Blacks living within the same counties as Whites still exist. The study analysis showed that younger Blacks living in urban counties with advanced stages of cervical cancer were more likely to receive radiation treatment options but were less likely to undergo surgical treatment options (p-value <.0001). Younger Blacks living in the rural BB and other rural counties were mainly treated with radiation options for the early stages of cervical cancer (p-value 0.001), while older ones received surgery options (p-value <.0001), and combined therapy of surgery and radiation options (p-value 0.05). When adjusted for age, stage of cancer, and county of residence, Blacks had 2.76 (95% CI 0.90-8.86) times the odds ratio of receiving immunotherapy options compared to Whites. Blacks had 0.74 (95% CI 0.58-0.95) times adjusted odds ratio of undergoing less surgery option compared to Whites. Our study findings suggest that cervical cancer treatment options and control interventions targeted towards disadvantaged women, particularly Blacks living in the rural BB and other rural counties have the potential to reduce and/or eradicate this preventable disease.

Mitochondrial glycerol 3-phosphate facilitates bumblebee pre-flight thermogenesis.

Bumblebees (Bombus terrestris) fly at low ambient temperatures where other insects cannot, and to do so they must pre-warm their flight muscles. While some have proposed mechanisms, none fully explain how pre-flight thermogenesis occurs. Here, we present a novel hypothesis based on the less studied mitochondrial glycerol 3-phosphate dehydrogenase pathway (mGPDH). Using calorimetry, and high resolution respirometry coupled with fluorimetry, we report substrate oxidation by mGPDH in permeabilised flight muscles operates, in vitro, at a high flux, even in the absence of ADP. This may be facilitated by an endogenous, mGPDH-mediated uncoupling of mitochondria. This uncoupling increases ETS activity, which results in increased heat release. Furthermore, passive regulation of this mechanism is achieved via dampened temperature sensitivity of mGPDH relative to other respiratory pathways, and subsequent consumption of its substrate, glycerol 3-phosphate (G3P), at low temperatures. Mitochondrial GPDH may therefore facilitate pre-flight thermogenesis through poor mitochondrial coupling. We calculate this can occur at a sufficient rate to warm flight muscles until shivering commences, and until flight muscle function is adequate for bumblebees to fly in the cold.