Impact of Time to Receipt of Prosthesis on Total Healthcare Costs 12 Months Postamputation

Wound management, healing, and early prosthetic rehabilitation: Part 2 - A scoping review of physical biomarkers

BACKGROUND

The timely provision of load-bearing prostheses significantly reduces healthcare costs and lowers post-amputation mortality risk. However, current methods for assessing residuum health remain subjective, underscoring the need for standardized, evidence-based approaches incorporating physical biomarkers to evaluate residual limb healing and determine readiness for prosthetic rehabilitation.

OBJECTIVES

This review aimed to identify predictive, diagnostic, and indicative physical biomarkers of healing of the tissues and structures found in the residual limbs of adults with amputation.

METHODOLOGY

A scoping review was conducted following Joanna Briggs Institute (JBI) and PRISMA-ScR guidance. Searches using "biomarkers", "wound healing", and "amputation" were performed on May 6, 2023, on Web of Science, Ovid MEDLINE, Ovid Embase, Scopus, Cochrane, PubMed, and CINAHL databases. Inclusion criteria were: 1) References to physical biomarkers and healing; 2) Residuum tissue healing; 3) Clear methodology with ethical approval; 4) Published from 2017 onwards. Articles were assessed for quality (QualSyst tool) and evidence level (JBI system), and categorized by study, wound, and model type. Physical biomarkers that were repeated not just within categories, but across more than one of the study categories were reported on.

FINDINGS

The search strategy identified 3,306 sources, 157 of which met the inclusion criteria. Histology was the most frequently repeated physical biomarker used in 64 sources, offering crucial diagnostic insights into cellular healing processes. Additional repeated indicative and predictive physical biomarkers, including ankle-brachial index, oxygenation measures, perfusion, and blood pulse and pressure measurements, were reported in 25, 19, 13, and 12 sources, respectively, providing valuable data on tissue oxygenation and vascular health.

CONCLUSION

Ultimately, adopting a multifaceted approach that integrates a diverse array of physical biomarkers (accounting for physiological factors and comorbidities known to influence healing) may substantially enhance our understanding of the healing process and inform the development of effective rehabilitation strategies for individuals undergoing amputation.

Wound management, healing, and early prosthetic rehabilitation: Part 1 - A scoping review of healing and non-healing definitions

BACKGROUND

Following lower limb amputation, timely prosthetic fitting enhances mobility and quality of life. However, inconsistent definitions of surgical site healing complicate prosthesis readiness assessment and highlight the need for objective wound management measures.

OBJECTIVE

This review aimed to compile definitions of healing and non-healing provided in the literature investigating biomarkers of healing of the tissues and structures found in the residual limbs of adults with amputation.

METHODOLOGY

A scoping review was conducted following JBI and PRISMA-ScR guidance. Searches using "biomarkers," "wound healing," and "amputation" were performed on May 6, 2023, on Web of Science, Ovid MEDLINE, Ovid Embase, Scopus, Cochrane, PubMed, and CINAHL databases. Inclusion criteria were: 1) References to biomarkers and healing; 2) Residuum tissue healing; 3) Clear methodology with ethical approval; 4) Published from 2017 onwards. Articles were assessed for quality (QualSyst tool) and evidence level (JBI system).

FINDINGS

Of 3,306 articles screened, 219 met the inclusion criteria and are reviewed in this article, with 77% rated strong quality. 43% of all included sources did not define healing, while the remainder used specific criteria including epithelialization (14%), wound size reduction (28%), gradings scales (3%), scarring (1%), absence of wound complications (2%), hydroxyproline levels (0.5%), no amputation (0.5%), or neovascularization (0.5%). 84% of included sources did not provide definitions of non-healing. Studies defining non-healing used criteria like wound complications (4%), the need for operative interventions (4%), or lack of wound size reduction (1%). For 10% of included sources, healing and non-healing definitions were considered not applicable given the research content. Total percentages exceed 100% for both healing and non-healing definitions because some sources used two definition classifications, such as epithelialization and wound size reduction. The findings indicate a lack of standardized definitions irrespective of study type.

CONCLUSION

This review reveals significant gaps in current definitions of healing and non-healing, often based on superficial assessments that overlook deeper tissue healing and mechanical properties essential for prosthesis use. It emphasizes the need for comprehensive definitions incorporating biomarkers and psychosocial factors to improve wound management and post-amputation recovery.

Factors influencing access to and participation in rehabilitation for people with lower limb amputation in East, South, and Southeast Asian developing countries: the perspective of rehabilitation professionals - a qualitative study

PURPOSE

To identify barriers and enablers for access to and participation in rehabilitation for people with LLA in East, South, and Southeast Asian developing countries from the perspective of rehabilitation professionals.

MATERIAL AND METHODS

A mixed-method study involving an anonymous cross-sectional screening survey followed by in-depth interviews of rehabilitation professionals in these regions following the COREQ guidelines. Participants were surveyed online using convenience and snowball sampling techniques to inform a purposive heterogenic sample for semi-structured online interviews, between September 2021 to February 2022. Interview transcripts were analysed and thematically coded using the modified Health Care Delivery System Approach (HCDSA) framework.

RESULTS

A total of 201 quantitative survey responses shaped the interview questions and participation of 28 participants from 13 countries for the qualitative investigation. Important factors at the patient level were sex, economics, health issues, language differences, and lack of awareness; at the care team level, peer and/or family support, referrals, and the gender of the professional; at the organizational level, service availability, resources, and quality; and at the environmental level, policies, supports, and physical and/or social accessibility.

CONCLUSIONS

Identified interlinked factors at multiple levels of the HCDSA underpin the need for a systems approach to develop and address regional rehabilitation service provision but requires contextually adapted policy.

The effect of depression on prosthesis prescription in men and women who have undergone a lower limb amputation

PURPOSE

To determine gender disparities and potential factors that modify prosthesis prescription practices in veteran patients who have undergone their first major unilateral amputation due to diabetes or peripheral arterial disease.

MATERIALS AND METHODS

A retrospective cohort study using the VA Corporate Data Warehouse to compare prosthesis prescription rates and time to prescription between men and women veterans. The primary exposure was gender. The primary outcome was a qualifying prosthesis prescription within 12 months of the incident amputation. The secondary outcome was time to prosthesis prescription. Multiple logistic and linear regression was used to control for potential confounders and identify potential effect modification.

RESULTS

2,862 individuals met study criteria, with 1690 (60%) prescribed a qualifying prosthesis. Men were more likely to receive a prosthesis prescription than women (59% versus 45%, respectively; p = 0.03). This difference was observed primarily among those with a diagnosis of major depressive disorder. In this subgroup, the odds of men receiving a prosthesis over women was over 3 times (adjusted odds ratio = 3.3; 95% Confidence Interval, 1.5, 7.4). Men had a mean shorter time to prescription compared to women (112 ± 72 versus 136 ± 79 days, respectively, p = 0.08).

Depression in women negatively impacts their prosthesis prescription rates and time to prescription compared to men. This disparity may have significant impacts on future function and quality of life.Implications for RehabilitationThis study found that men more commonly received a prosthesis prescription and received it earlier than women.This disparity was most extreme among women who had been diagnosed with major depressive disorder.Providers should identify at risk patients early and consider targeted interventions to address depression during the preoperative and immediate postoperative phases.Future research should continue to work to identify gender-specific needs that exacerbate disparity.

Differences in Prosthetic Prescription Between Men and Women Veterans After Transtibial or Transfemoral Lower-Extremity Amputation: A Longitudinal Cohort Study (2005-2018)

OBJECTIVE

To evaluate whether prosthetic prescription differed by gender and the extent to which differences were mediated by measured factors.

DESIGN

Retrospective longitudinal cohort study using data from Veterans Health Administration (VHA) administrative databases.

SETTING

VHA patients throughout the United States.

PARTICIPANTS

The sample included 20,889 men and 324 women who had an incident transtibial or transfemoral amputation between 2005 and 2018.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Time to prosthetic prescription (up to 1 year). We used parametric survival analysis (an accelerated failure time model) to assess gender differences. We estimated mediation effects of amputation level, pain comorbidity burden, medical comorbidities, depression, and marital status on time to prescription.

RESULTS

In the 1 year after amputation, the proportion of women (54.3%) and men (55.7%) prescribed a prosthesis was similar. However, after we controlled for age, race, ethnicity, enrollment priority, VHA region, and service-connected disability, the time to prosthetic prescription was significantly faster among men compared with women (acceleration factor=0.73; 95% confidence interval, 0.61-0.87). The difference in time to prosthetic prescription between men and women was significantly mediated by amputation level (23%), pain comorbidity burden (-14%), and marital status (5%) but not medical comorbidities or depression.

CONCLUSIONS

Although the proportion of patients with prosthetic prescription at 1-year postamputation was similar between men and women, women received prosthetic prescriptions more slowly than men, suggesting that more work is needed to understand barriers to timely prosthetic prescriptions among women, and how to intervene to reduce those barriers.

GGEM: Gender, Geography, and EMployment differences based on mobility levels among lower limb prosthesis users living in the United States

BACKGROUND

For individuals with a disability, an increase in functional mobility may improve their quality of life and well-being. Greater understanding is needed on how factors such as gender, geography, and employment may play a role in mobility levels among individuals with lower limb amputation.

OBJECTIVES

To assess the relationship between gender, geography, and employment status on mobility among lower limb prosthesis users.

METHODS

A cross-sectional analysis of 7,524 patient mobility outcomes completed across the United States was performed. The regression model included the independent variables, such as age, gender, region, employment status, and amputation level. Mobility was entered as the dependent variable.

RESULTS

Individuals who were employed had 3.6 times the odds of reaching increased mobility (Prosthetic Limb Users' Survey of Mobility ≥ 50) than those unemployed (odds ratio 3.56, 95% confidence interval 3.10-4.09). Gender and geography were significantly associated with mobility as well.

CONCLUSIONS

Being employed is associated with greater odds of reaching increased mobility. Addressing factors such as returning to employment may aid in improving mobility levels among prosthesis users.

Influential factors for access to and participation in rehabilitation for people with lower limb amputation in East, South, and Southeast Asian developing countries: a scoping review

PURPOSE

To explore factors impacting access to and participation in rehabilitation for people with lower limb amputation (LLA) in East, South, and Southeast Asian developing countries.

MATERIALS AND METHODS

A scoping review was undertaken following the PRISMA-ScR guidelines. Five electronic databases (PsycINFO (Ovid), Medline (Ovid), CINAHL (EBSCO), AMED, and Proquest Social Sciences) were searched for articles from January 1980 till March 2020. Two authors independently assessed articles for inclusion. Included articles were classified according to the Health Care Delivery System Approach (HCDSA) framework levels.

RESULTS

Twenty-four studies from 14 countries were identified. At patient level, age, gender, limited rehabilitation awareness, and economic status; at the rehabilitation level, gaps in referrals, family support, and professional skills; at the environmental level, services availability, and location; and, at government level, service costs, income loss, and lack of supporting policies were identified as important influencing factors.

CONCLUSIONS

Rehabilitation access and participation factors were identified at multiple levels of the HCDSA. Contextually appropriate and accessible services considering individual characteristics and socio-economic status of individuals with LLA are needed, with timely referral to rehabilitation by trained professionals. Improving rehabilitation services for people with LLA in Asian developing countries requires supportive environments, accessible transport, social and financial security, and increased awareness, underpinned by appropriate policy.Implications for rehabilitationProvision of timely referral to rehabilitation by primary/acute health care settings with involvement of family/peer supports.Improved government support systems to facilitate individual access to and participation in rehabilitation with consideration of contextual socio-demographic and economic factors.Prioritisation of adequately resourced and well-designed rehabilitation centres by health care organisations in accessible locations.Implementation by local government of strategies to support development and implementation of well resourced, accessible, equitable, and contextually responsive rehabilitation services.

Disability, economic and work-role status of individuals with unilateral lower-limb amputation and their families in Bangladesh, post-amputation, and pre-rehabilitation: A cross-sectional study

BACKGROUND: Amputation has significant negative impacts on physical, psychological, social and economic wellbeing of individuals and families. This is potentially compounded by significant delays to rehabilitation in Bangladesh. OBJECTIVE: To quantify disability, occupation and socioeconomic status of people with unilateral lower-limb amputation (LLA) and their families in Bangladesh, post-amputation and pre-rehabilitation. METHODS: Between November 2017 and February 2018, people with unilateral LLA attending two locations of Center for the Rehabilitation of the Paralyzed, Bangladesh, for prosthetic rehabilitation were surveyed pre-rehabilitation, using the World Health Organization Disability Assessment Schedule (WHODAS-2.0) with additional socio-economic questions. Data were analysed descriptively, using cross-tabulation with Chi-square and Fisher’s exact tests. RESULTS: Seventy-six individuals participated. The majority had traumatic (64.5%), transtibial amputation (61.8%), were young adults (37.92±12.35 years), in paid work prior to LLA (80%), married (63.2%), male (81.6%), from rural areas (78.9%), with primary/no education (72.4%). After LLA mobility (WHODAS score 74.61±13.19) was their most negatively affected domain. Most (60.5%) did not return to any occupation. Acute healthcare costs negatively impacted most families (89.5%), over 80% becoming impoverished. Nearly 70% of previous income-earners became economically dependent changing traditional family roles. CONCLUSIONS: Following LLA, most participants experienced significant mobility impairment and became economically dependent. The impact of LLA extends beyond the individual, to families who often face challenges to traditional primary earner gendered roles. Improved access to timely and affordable rehabilitation is required to reduce the significant personal and societal costs of disability after LLA.

A prospective assessment of an adjustable, immediate fit, subischial transfemoral prosthesis

Objective

To assess the feasibility of an adjustable, subischial transfemoral prosthesis by comparing self-reported outcome measures regarding socket comfort, fit and utility relative to a persons’ conventionally made socket. Assessing limb compressibility was another aim of this study.

Design

A single-group pre-post intervention design.

Setting

Physical medicine and rehabilitation biomechanics laboratory.

Participants

All 18 enrolled participants (N = 18) completed the feasibility trial. There were 16 men and 2 women with an average age of 59.4 (±7) years. Most of the participants (61.1%) had worn a socket for 1 to 10 years before the trial, 22.2% of the participants had worn one for less than a year, and 16.7% of the participants had worn a prosthesis for more than 10 years.

Intervention

Participants were fit with the study prosthesis and used it for a 2-week home trial.

Main Outcome Measures

A Prosthetic Comfort and Utility Questionnaire was completed on the participant's conventional prosthetic device and the subischial socket system after the trial.

Results

The adjustable subischial prostheses were rated superior overall to the participant's conventional sockets (40.9 ± 7.2 vs 32.8 ± 10.8; P=.004). Six of the 10 parameters measured (adjustability, overall fit, prosthesis weight, sitting comfort, standing comfort, and standing stability) were rated higher for the adjustable prostheses compared to the conventional sockets. Compression of the soft tissues of the thigh ranged from 5.6 ± 4.2 cm at the distal end to 7.3 ± 3.6 cm at the proximal site. There were no falls, skin breakdown, or limb ischemia. At the 2-month telephone follow-up, 61% of subjects had transitioned to using the adjustable subischial socket most of the time.

Conclusions

The adjustable, immediate fit, subischial prosthesis provided safe, comfortable, and functional ambulation for persons with transfemoral limb loss in this short-term feasibility study. This study supports the consideration of a new paradigm in transfemoral prosthetics—adjustable subischial sockets. These devices should be tested in a larger multi-center study.

Value and Applicability of Large Administrative Healthcare Databases in Prosthetics and Orthotics Outcomes Research

The goal of health economics and outcomes research is to improve healthcare decision making. In the absence of high-value clinical data, the availability and quality of administrative healthcare data could be vital in the generation of evidence for orthotics and prosthetics services. The purpose of this article is to provide a stronger understanding of administrative healthcare data analysis, an area that has been scarcely examined within prosthetics and orthotics despite the wealth of information available within such data. Examples of common datasets in this arena currently available are provided, as well as an overview of the limitations and advantages of studies utilizing such datasets.

The Value of Health Economics and Outcomes Research in Prosthetics and Orthotics

The demand has increased for evidence regarding the effectiveness and value of prosthetic and orthotic rehabilitation interventions. Clinicians and managers are under pressure to provide treatment recommendations and demonstrate effectiveness through outcomes. It is often assumed that rehabilitation interventions, including the provision of custom-made and custom-fit orthotic and prosthetic devices, are beneficial to patients. Assessing the value of orthotic and prosthetic services has become more critical to continue to ensure equitable access to needed services. Health economics and outcomes research methods serve as tools to gauge the value of prosthetic and orthotic rehabilitation interventions. The purpose of this article is to provide an overview of the current need of health economics and outcomes research in orthotics and prosthetics, to introduce common economic methods that assist to generate real-world evidence, and to discusses the potential value of economic methods for clinicians and clinical practice.

Clinical Outcome of Transfemoral Direct Socket Interface (Part 2)

BACKGROUND

Amputation at the transfemoral (TF) level reduces the rate of successful prosthetic fitting, functional outcome, and quality of life (QoL) compared with transtibial amputation. The TF socket interface is considered the most critical part of the prosthesis, but socket discomfort is still the most common user complaint. Direct Socket for transfemoral prosthesis users is a novel interface fabrication process where the socket is shaped and laminated directly on the residual limb and delivered in a single visit.

OBJECTIVES

The aim of this study was to investigate if prosthetic users' quality of life (QoL), comfort, and mobility with a Direct Socket TF interface were comparable to their experience with their previous prostheses.

METHODOLOGY

The pre/post design prospective cohort study included 47 subjects. From this cohort, 36 subjects completed the 6-months follow-up (mean age 58 years, 27 males). Outcomes at baseline included EQ-5D-5L®, PLUS-M™, CLASS, ABC, AMPPRO, and TUG. At 6-weeks and 6-months, subjects repeated all measures. Seven Certified Prosthetist (CP) investigators performed observations and data collection at six different sites (from July 2018 to April 2020).

FINDINGS

Results showed significant improvement in all outcome measures for the 36 subjects that completed both 6-weeks and 6-months follow-ups. CLASS sub-scales showed significantly improved stability, suspension, comfort, and socket appearance. Improvement in K-Level and less use of assistive devices were observed with the AMPPRO instrument, indicating improved user mobility and performance. QoL was also increased, as measured in Quality-Adjusted-Life-Years (QALY) from the EQ-5D-5L.

CONCLUSIONS

Evidence from the findings demonstrate that the Direct Socket TF system and procedure can be a good alternative to the traditional method of prosthetic interface delivery.

Fitting transtibial and transfemoral prostheses in persons with a severe flexion contracture: problems and solutions - a systematic review

PURPOSE

In persons with a hip or knee flexion contracture ≥25°, fitting a prosthesis is said to be difficult. This systematic review aims to assess the evidence for fitting of a prosthesis in persons with a severe contracture (≥25°) after a lower limb amputation.

METHOD

PubMed, Embase, Scopus, CINAHL, and Orthotics & Prosthetics Virtual Library databases were searched from inception to December 2019, using database specific search terms related to amputation, prosthesis, and contracture. Reference lists of included studies were checked for relevant studies. Quality of the included studies was assessed using the critical appraisal checklist for case reports (Joanna Briggs Institute).

RESULTS

In total, 13 case studies provided evidence for fitting of a prosthesis in more than 63 persons with a transtibial amputation and three with a transfemoral amputation, all of whom had a hip or knee flexion contracture ≥25°. Some studies found a reduction in contractures after prosthesis use.

CONCLUSIONS

Several techniques for fitting a prosthesis in case of a flexion contracture ≥25° were found. Contracture reduction occurred in some cases and was possibly related to prosthesis use. Fitting a transtibial or transfemoral prosthesis in persons with a lower limb amputation with a severe flexion contracture is possible.IMPLICATIONS FOR REHABILITATIONThis study provides information on prosthesis prescriptions and adaptations for persons with a transfemoral and transtibial amputation with a flexion contracture ≥25°.The fitting of bent prostheses is not limited by prosthetic components and techniques.Parallel to the use of bent prostheses, it is also important to treat the contracture.

Transfemoral Socket Fabrication Method Using Direct Casting: Outcomes Regarding Patient Satisfaction with Device and Services

BACKGROUND

Direct Socket for transfemoral (DS-TF) prosthetic user is a novel method of fabricating a laminated interface on to the residual limb but requires different training, production method and service model than what most prosthetists are familiar with. This method and model may improve patient satisfaction by enabling interface fabrication and delivery in one visit.

OBJECTIVES

Document patient satisfaction regarding DS-TF interface versus the prosthetic users' previous socket in terms of interface function and the clinic service model.

METHODOLOGY

In this longitudinal study (from July 2018 to April 2020), the DS-TF was implemented in six prosthetic clinics across the United States. Certified prosthetists (CP) and assistants were trained using a standard protocol. 47 prosthetic users participated, both those in need of a new socket and those without need. Two modules from the Orthotics and Prosthetics Users' Survey (OPUS), involving questions related to satisfaction with the Device and Services, was used to evaluate each DS-TF user outcome vs. baseline. The only part of the prosthesis that was replaced was the interface, except in 2 cases.

FINDINGS

Each DS-TF interface was fabricated, fit and delivered in a single clinic visit. At 6-months follow-up, 38 users reported an average of 29.8% increase in satisfaction with their new interface compared with original, and a 14.8% increase in satisfaction with the services they received from the clinic in providing of the new prosthesis vs. their original prosthesis. The main outcome increases were between baseline (initial fitting) and 6-week follow-up and remained consistent after 6 months. This improvement was consistent irrespective if the user needed a new socket for clinical reasons or not.

CONCLUSIONS

This study shows that after a standardized training and implementation, the DS-TF fabrication process including a new interface, improves the user's satisfaction with their prosthetic device and services.