A systematic literature review of quality of life in lower limb amputees

Patients with unilateral transfemoral amputation treated with a percutaneous osseointegrated prosthesis: a cost-effectiveness analysis

Aims

The aim of this study was to compare the cost-effectiveness of treatment with an osseointegrated percutaneous (OI-) prosthesis and a socket-suspended (S-) prosthesis for patients with a transfemoral amputation.

Patients and Methods

A Markov model was developed to estimate the medical costs and changes in quality-adjusted life-years (QALYs) attributable to treatment of unilateral transfemoral amputation over a projected period of 20 years from a healthcare perspective. Data were collected alongside a prospective clinical study of 51 patients followed for two years.

Results

OI-prostheses had an incremental cost per QALY gained of €83 374 compared with S-prostheses. The clinical improvement seen with OI-prostheses was reflected in QALYs gained. Results were most sensitive to the utility value for both treatment arms. The impact of an annual decline in utility values of 1%, 2%, and 3%, for patients with S-prostheses resulted in a cost per QALY gained of €37 020, €24 662, and €18 952, respectively, over 20 years.

Conclusion

From a healthcare perspective, treatment with an OI-prosthesis results in improved quality of life at a relatively high cost compared with that for S-prosthesis. When patients treated with S-prostheses had a decline in quality of life over time, the cost per QALY gained by OI-prosthesis treatment was considerably reduced. Cite this article: Bone Joint J 2018;100-B:527-34.

Satisfaction with life in individuals with a lower limb amputation: The importance of active coping and acceptance

The aim of this study was to analyze the relationship between sociodemographic/clinical characteristics, coping strategies and satisfaction with life in individuals with lower limb amputation. Sixty-three individuals with a lower limb amputation due to Diabetes and Peripheral Vascular Disease participated in the study and answered measures of coping strategies and satisfaction with life. Findings revealed high dissatisfaction with life. Acceptance and active coping were the most used coping strategies. Satisfaction with life was positively associated with active and planning coping, religion, acceptance and humour. There were differences in coping strategies according to gender, age, marital status, presence of residual limb pain, prosthesis use and mobility level. Results emphasize the differential role of coping strategies, for each individual. Psychosocial interventions need to take into consideration coping strategies during the process of rehabilitation and be specific regarding individuals` sociodemographic and clinical characteristics. This study may help design interventions that answer individuals with lower limb amputations given that coping strategies are a valuable resource in the promotion of satisfaction with life.

Factors influencing quality of life following lower limb amputation for peripheral arterial occlusive disease: A systematic review of the literature

BACKGROUND

The majority of lower limb amputations are undertaken in people with peripheral arterial occlusive disease, and approximately 50% have diabetes. Quality of life is an important outcome in lower limb amputations; little is known about what influences it, and therefore how to improve it.

OBJECTIVES

The aim of this systematic review was to identify the factors that influence quality of life after lower limb amputation for peripheral arterial occlusive disease.

METHODS

MEDLINE, EMBASE, CINAHL, PsycINFO, Web of Science and Cochrane databases were searched to identify articles that quantitatively measured quality of life in those with a lower limb amputation for peripheral arterial occlusive disease. Articles were quality assessed by two assessors, evidence tables summarised each article and a narrative synthesis was performed.

STUDY DESIGN

Systematic review.

RESULTS

Twelve articles were included. Study designs and outcome measures used varied. Quality assessment scores ranged from 36% to 92%. The ability to walk successfully with a prosthesis had the greatest positive impact on quality of life. A trans-femoral amputation was negatively associated with quality of life due to increased difficulty in walking with a prosthesis. Other factors such as older age, being male, longer time since amputation, level of social support and presence of diabetes also negatively affected quality of life.

CONCLUSION

Being able to walk with a prosthesis is of primary importance to improve quality of life for people with lower limb amputation due to peripheral arterial occlusive disease. To further understand and improve the quality of life of this population, there is a need for more prospective longitudinal studies, with a standardised outcome measure. Clinical relevance This is of clinical relevance to those who are involved in the rehabilitation of persons with lower limb amputations. Improved quality of life is associated with successful prosthetic use and focus should be directed toward achieving this.

The process of becoming a user of an osseointegrated prosthesis following transfemoral amputation: a qualitative study

PURPOSE

To investigate what characterizes the process of becoming a user of an osseointegrated prosthesis following transfemoral amputation.

METHOD

The study is based on the descriptive phenomenological framework Reflective Lifeworld Research. Data were collected through in-depth interviews with seven participants who had undergone transfemoral implant surgery and currently used their osseointegrated prosthesis. Data were analyzed according to the guidelines given in Reflective Lifeworld Research.

RESULTS

The essential meaning of becoming a user of an osseointegrated prosthesis is characterized by determination to achieve rehabilitation results as well as a struggle to get familiar with the new prosthesis. When familiar with the prosthesis, participants begin to experience radical improvements in their everyday life, compared to their life with the socket suspended prosthesis. The essential meaning is elaborated on in four constituents: Determination to achieve rehabilitation results with the short training prosthesis, struggling to get familiar with the osseointegrated prosthesis, experiencing improvements in everyday life and reconnecting with one's prior self-perception.

CONCLUSION

All the participants experienced increased action space and a more positive outlook on life. However, it took determination and stamina to become a user of an osseointegrated prosthesis, and participants faced several challenges throughout this process. Consequently, it remains important to raise awareness of the difficulties faced during this process. Implications for Rehabilitation The findings from this study suggest an increased healthcare support to users of an transfemoral osseointegrated prosthesis in the period of rehabilitation and adjustment, as the results of being able to use the osseointegrated prosthesis may outweigh the obstacles of getting there. Implementation of long-term follow-up and psychosocial support initiatives may improve the adjustment process following osseointegration. Support of patients with an osseointegrated prosthesis may be facilitated through formation of specific rehabilitation groups together with increased use of information technology such as social media and relevant online communities which provide forums for interaction and dialog with people in similar situations.

Stratified cost-utility analysis of C-Leg versus mechanical knees: Findings from an Italian sample of transfemoral amputees

BACKGROUND

The fitting rate of the C-Leg electronic knee (Otto-Bock, D) has increased steadily over the last 15 years. Current cost-utility studies, however, have not considered the patients' characteristics.

OBJECTIVES

To complete a cost-utility analysis involving C-Leg and mechanical knee users; "age at the time of enrollment," "age at the time of first prosthesis," and "experience with the current type of prosthesis" are assumed as non-nested stratification parameters.

STUDY DESIGN

Cohort retrospective.

METHODS

In all, 70 C-Leg and 57 mechanical knee users were selected. For each stratification criteria, we evaluated the cost-utility of C-Leg versus mechanical knees by computing the incremental cost-utility ratio, that is, the ratio of the "difference in cost" and the "difference in utility" of the two technologies. Cost consisted of acquisition, maintenance, transportation, and lodging expenses. Utility was measured in terms of quality-adjusted life years, computed on the basis of participants' answers to the EQ-5D questionnaire.

RESULTS

Patients over 40 years at the time of first prosthesis were the only group featuring an incremental cost-utility ratio (88,779 €/quality-adjusted life year) above the National Institute for Health and Care Excellence practical cost-utility threshold (54,120 €/quality-adjusted live year): C-Leg users experience a significant improvement of "mobility," but limited outcomes on "usual activities," "self-care," "depression/anxiety," and reduction of "pain/discomfort."

CONCLUSION

The stratified cost-utility results have relevant clinical implications and provide useful information for practitioners in tailoring interventions. Clinical relevance A cost-utility analysis that considered patients characteristics provided insights on the "affordability" of C-Leg compared to mechanical knees. In particular, results suggest that C-Leg has a significant impact on "mobility" for first-time prosthetic users over 40 years, but implementation of specific low-cost physical/psychosocial interventions is required to retun within cost-utility thresholds.

Establishing the Turkish version of the SIGAM mobility scale, and determining its validity and reliability in lower extremity amputees

PURPOSE

The aim of this study is to adapt the Special Interest Group in Amputee Medicine (SIGAM) mobility scale to Turkish, and to test its validity and reliability in lower extremity amputees.

MATERIAL AND METHODS

Adaptation of the scale into Turkish was performed by following the steps in American Association of Orthopedic Surgeons (AAOS) guideline. Turkish version of the scale was tested twice on 109 patients who had lower extremity amputations, at hours 0 and 72. The reliability of the Turkish version was tested for internal consistency and test-retest reliability. Structural validity was tested using the "scale validity" method. For this purpose, the scores of the Short Form-36 (SF-36), Functional Ambulation Scale (FAS), Get Up and Go Test, and Satisfaction with the Prosthesis Questionnaire (SATPRO) were calculated, and analyzed using Spearman's correlation test.

RESULTS

Cronbach's alpha coefficient was 0.67 for the Turkish version of the SIGAM mobility scale. Cohen's kappa coefficients were between 0.224 and 0.999. Repeatability according to the results of the SIGAM mobility scale (grades A-F) was 0.822. We found significant and strong positive correlations of the SIGAM mobility scale results with the FAS, Get Up and Go Test, SATPRO, and all of the SF-36 subscales.

CONCLUSION

In our study, the Turkish version of the SIGAM mobility scale was found as a reliable, valid, and easy to use scale in everyday practice for measuring mobility in lower extremity amputees. Implications for Rehabilitation Amputation is the surgical removal of a severely injured and nonfunctional extremity, at a level of one or more bones proximal to the body. Loss of a lower extremity is one of the most important conditions that cause functional disability. The Special Interest Group in Amputee Medicine (SIGAM) mobility scale contains 21 questions that evaluate the mobility of lower extremity amputees. Lack of a specific Turkish scale that evaluates rehabilitation results and mobility of lower extremity amputees, and determines their needs, directed us to perform a study on this topic when we took the number of amputations performed in our country into consideration. SIGAM mobility scale is directed at rehabilitation specialists who are working in amputee medicine. Turkish version of this scale was found both reliable and valid in our study and hence it can be used in clinical practice and studies.

Pharmacologic interventions for treating phantom limb pain

BACKGROUND

This is an updated version of the original Cochrane review published in Issue 12, 2011. Phantom limb pain (PLP) is pain that arises in the missing limb after amputation and can be severe, intractable, and disabling. Various medications have been studied in the treatment of phantom pain. There is currently uncertainty in the optimal pharmacologic management of PLP.

OBJECTIVES

This review aimed to summarise the evidence of effectiveness of pharmacologic interventions in treating PLP.

SEARCH METHODS

For this update, we searched the Cochrane Central Register of Controlled Trials (CENTRAL, the Cochrane Library), MEDLINE, and Embase for relevant studies. We ran the searches for the original review in September 2011 and subsequent searches for this update up to April 2016. We sought additional studies from clinical trials databases and reference lists of retrieved papers.

SELECTION CRITERIA

We included randomised and quasi-randomised trials studying the effectiveness of pharmacologic interventions compared with placebo, another active treatment, or no treatment, in established PLP. We considered the following outcomes: change in pain intensity, function, sleep, depression or mood, quality of life, adverse events, treatment satisfaction, and withdrawals from the study.

DATA COLLECTION AND ANALYSIS

We independently assessed issues of study quality and extracted efficacy and adverse event data. Due to the wide variability in the studies, we did not perform a meta-analysis for all the interventions and outcomes, but attempted to pool the results of some studies where possible. We prepared a qualitative description and narrative summary of results. We assessed clinical heterogeneity by making qualitative comparisons of the populations, interventions, outcomes/outcome measures, and methods.

MAIN RESULTS

We added only one new study with 14 participants to this updated review. We included a 14 studies (10 with low risk of bias and 4 with unclear risk of bias overall) with a total of 269 participants. We added another drug class, botulinum neurotoxins (BoNTs), in particular botulinum toxin A (BoNT/A), to the group of medications reviewed previously. Our primary outcome was change in pain intensity. Most studies did not report our secondary outcomes of sleep, depression or mood, quality of life, treatment satisfaction, or withdrawals from the study.BoNT/A did not improve phantom limb pain intensity during the six months of follow-up compared with lidocaine/methylprednisolone.Compared with placebo, morphine (oral and intravenous) was effective in decreasing pain intensity in the short term with reported adverse events being constipation, sedation, tiredness, dizziness, sweating, voiding difficulty, vertigo, itching, and respiratory problems.The N-methyl D-aspartate (NMDA) receptor antagonists ketamine (versus placebo; versus calcitonin) and dextromethorphan (versus placebo), but not memantine, had analgesic effects. The adverse events of ketamine were more serious than placebo and calcitonin and included loss of consciousness, sedation, hallucinations, hearing and position impairment, and insobriety.The results for gabapentin in terms of pain relief were conflicting, but combining the results favoured treatment group (gabapentin) over control group (placebo) (mean difference -1.16, 95% confidence interval -1.94 to -0.38; 2 studies). However, gabapentin did not improve function, depression score, or sleep quality. Adverse events experienced were somnolence, dizziness, headache, and nausea.Compared with an active control benztropine mesylate, amitriptyline was not effective in PLP, with dry mouth and dizziness as the most frequent adverse events based on one study.The findings for calcitonin (versus placebo; versus ketamine) and local anaesthetics (versus placebo) were variable. Adverse events of calcitonin were headache, vertigo, drowsiness, nausea, vomiting, and hot and cold flushes. Most of the studies were limited by their small sample sizes.

AUTHORS' CONCLUSIONS

Since the last version of this review, we identified another study that added another form of medical therapy, BoNTs, specifically BoNT/A, to the list of pharmacologic interventions being reviewed for clinical efficacy in phantom limb pain. However, the results of this study did not substantially change the main conclusions. The short- and long-term effectiveness of BoNT/A, opioids, NMDA receptor antagonists, anticonvulsants, antidepressants, calcitonins, and local anaesthetics for clinically relevant outcomes including pain, function, mood, sleep, quality of life, treatment satisfaction, and adverse events remain unclear. Based on a small study, BoNT/A (versus lidocaine/methylprednisolone) does not decrease phantom limb pain. Morphine, gabapentin, and ketamine demonstrate favourable short-term analgesic efficacy compared with placebo. Memantine and amitriptyline may not be effective for PLP. However, results must be interpreted with caution, as they were based mostly on a small number of studies with limited sample sizes that varied considerably and also lacked long-term efficacy and safety outcomes. The direction of efficacy of calcitonin, local anaesthetics, and dextromethorphan needs further clarification. Overall, the efficacy evidence for the reviewed medications is thus far inconclusive. Larger and more rigorous randomised controlled trials are needed for us to reach more definitive conclusions about which medications would be useful for clinical practice.

Comparison of quality of life in people with partial foot and transtibial amputation: A pilot study

BACKGROUND

Quality of life is often cited as a key influence in decisions about partial foot and transtibial amputations despite there being no studies comparing quality of life in these groups.

OBJECTIVES

To compare quality of life in people with partial foot amputation or transtibial amputation secondary to peripheral vascular disease and determine factors influencing quality of life in these cohorts.

STUDY DESIGN

Cross-sectional.

METHODS

Mail-out, mail-back version of the SF-36v2 Health Survey and an adapted version of the demographic section of the Trinity Amputation and Prosthesis Experience Scales-Revised were sent to people recruited through a large metropolitan hospital.

RESULTS

Both the SF-36v2 mental health component summary and physical component summary scores were comparable in the partial foot amputation (n = 10) and transtibial amputation (n = 23) cohorts. A multivariate linear regression showed that age, time with diabetes and the presence of retinopathy significantly influenced either the SF-36v2 mental health component summary or physical component summary whereas amputation level did not.

DISCUSSION

Results support existing descriptive data that indicate quality of life is comparable in cohorts with partial foot and transtibial amputation.

CONCLUSION

Our results suggest that quality of life need not to be a consideration when deciding between partial foot and transtibial amputation for persons with vascular disease. Surgeons and patients may wish to focus on other considerations, such as the relative risk of ulceration and subsequent amputation, when choosing between partial foot and transtibial amputation.

CLINICAL RELEVANCE

The similarity in quality of life between people with partial foot and transtibial amputation helps inform difficult decisions about amputation surgery by focusing on surgery that will reduce the risk of complications and secondary amputation without fear of compromising quality of life.

Quality of life in persons with partial foot or transtibial amputation: A systematic review

STUDY DESIGN

Systematic review.

BACKGROUND

Common beliefs about quality of life in people with partial foot and transtibial amputation are often described as passing comments in the literature with seeming little research evidence. A clear understanding of the research evidence is important to inform decisions about amputation level from a quality of life perspective.

OBJECTIVE

To systematically gather and appraise research evidence comparing quality of life between persons with partial foot and transtibial amputation.

METHODS

A comprehensive suite of databases (e.g. Cochrane Library, MEDLINE and Web of Science) were searched using terms relating to amputation level and quality of life. Reference lists of articles that met the inclusion criteria were hand searched. Included studies reported quantitative data for persons with partial foot and transtibial amputation secondary to peripheral vascular disease and diabetes. Studies were appraised using the McMaster University Critical Review form.

RESULTS

There is insufficient evidence comparing quality of life in people with partial foot and transtibial amputation. The available evidence suggests that quality of life may be very similar in people with partial foot and transtibial amputation and the small differences are not likely to be clinically meaningful.

CONCLUSION

Without adequate evidence comparing quality of life in people with partial foot and transtibial amputation, it is difficult to inform decisions about amputation level from a quality of life perspective.

CLINICAL RELEVANCE

There is insufficient evidence about differences in QoL between persons with PFA or TTA. Contrary to common belief, the available evidence suggests that QoL may be similar in persons with PFA and TTA. Further research is needed to inform decisions about amputation level from a QoL perspective.

Psychological effects of amputation: A review of studies from India

Amputation is a major health burden on the families, society, and on medical services as well. Traumatic limb amputation is a catastrophic injury and an irreversible act which is sudden and emotionally devastating for the victims. In addition, it causes inability to support self and the family and driving many patients toward various psychiatric disorders. Extensive information regarding the effects of amputation has not been ascertained and therefore it was decided to do a systematic review. The goal of this review was to provide comprehensive information of peer-reviewed papers examining the psychological distress among amputees in India. A search of the literature resulted in a total of 12 articles with varied sample size from 16 to 190. The sample has been largely comprised males with lower limb amputation caused by primarily traumatic ones, i.e., motor vehicle accident, railway track accidents, machinery injury, blasts, etc., The prevalence of psychiatric disorders among amputees has been found to be in the range of 32% to 84% including depression rates 10.4%-63%, posttraumatic stress disorder 3.3%-56.3%, and phantom limb phenomenon 14%-92%. Although the studies reported that symptoms of anxiety and depression become better over the course of time, however surgical treatment providers need to liaise with psychiatrists and psychologists to support and deal with the psychological disturbances.

Describe the outcomes of dysvascular partial foot amputation and how these compare to transtibial amputation: a systematic review protocol for the development of shared decision-making resources

BACKGROUND

Helping people make well-informed decisions about dysvascular partial foot amputation is becoming increasingly important as improvements in diabetes care and vascular surgery make more distal amputations increasingly possible. The high rates of complications and reamputations associated with partial foot amputation are of concern, particularly given that transtibial amputation seems to result in similar outcomes (e.g., mobility and quality of life) with comparatively few complications and reamputations. The aim of this review is to describe the outcomes of dysvascular partial foot amputation and compare these to transtibial amputation. Results from the review are intended for use in the development of shared decision-making resources.

METHODS/DESIGN

A comprehensive range of databases-MEDLINE, EMBASE, PsycINFO, AMED, Cumulative Index of Nursing and Allied Health Literature (CINAHL), ProQuest Nursing and Allied Health, and Web of Science-will be searched using National Library of Medicine, Medical Subject Headings (MeSH) terms as well as title, abstract, and keywords relating to different amputation levels and outcomes of interest; specifically: incidence, prevalence, and rate of amputation; rate of mortality, wound failure, dehiscence, and time between index and ipsilateral reamputations; and mobility, functional ability, activity and participation, quality of life, pain, and psychosocial outcomes including depression and anxiety. Articles that meet the inclusion criteria will be hand-searched for relevant citations. A forward citation search using Google Scholar will be used to identify articles not yet indexed. Original research published in the English language after 1 January 2000 will be included. The McMaster Critical Review Forms will be used to assess methodological quality and identify sources of bias. Included articles will be independently appraised by two reviewers. Data will be extracted using a spreadsheet based on the Cochrane Consumers and Communication Review Group's data extraction template by a primary reviewer and checked for accuracy and clarity by a second reviewer. Findings from the review will be reported as a narrative without meta-analysis given the anticipated heterogeneity of the literature.

DISCUSSION

Results from the review can be used in the design of shared decision-making resources to help inform difficult decisions about partial foot amputation.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42015029186.

The relationship between prosthesis use, phantom pain and psychiatric symptoms in male traumatic limb amputees

OBJECTIVES

The purpose of this study was to identify psychiatric symptoms by comparing male patients with traumatic leg amputations (LAs) with healthy controls and to determine the association between these psychiatric symptoms and phantom pain and prosthesis use characteristics.

METHODS

One hundred four volunteers, 51 LA patients (group 1) and 53 healthy controls (group 2) were included. Demographic data including age, height, weight, time since amputation, duration of prosthesis use, and Satisfaction with Prosthesis Questionnaire scores were recorded. Phantom pain was measured a visual analog scale (VAS). Psychiatric symptoms were measured using the Symptom Checklist-90-R, Beck Depression Inventory, Pittsburgh Sleep Quality Index, Rosenberg Self-Esteem Scale, and State-Trait Anxiety Inventory. Correlations were determined between time since amputation, duration of prosthesis use and satisfaction with prosthesis questionnaire scores and psychiatric scale scores.

RESULTS

Amputee patients had higher phobic anxiety, state anxiety, trait anxiety and sleep disturbance scores (p<0.05) than the controls. No difference was determined in terms of psychiatric symptoms between the phantom pain and no phantom pain groups (p>0.05). There were significant negative correlations between time since amputation, duration of prosthesis use, duration of daily prosthesis use, and satisfaction with prosthesis questionnaire scores and psychiatric symptoms.

CONCLUSIONS

Apart from anxiety (state, trait or phobic) and disturbed sleep, other psychiatric symptoms in amputee patients undergoing lengthy prosthetic rehabilitation may not differ from those of healthy controls. The presence and severity of phantom pain appear to be unrelated to general psychiatric symptomatology. Length of time since amputation, length of prosthesis use, daily length of prosthesis use and prosthesis satisfaction are negatively correlated with general psychiatric symptoms. These characteristics must be borne in mind in psychiatric and prosthetic rehabilitation.

Long-term follow-up of negative pressure wound therapy with instillation: a limb salvage procedure?

Negative pressure wound therapy (NPWT) is a treatment to reduce oedema, stimulate granulation tissue formation, remove wound exudate and diminish wound area, thus preparing it for secondary healing, skin grafting or coverage with flaps. The association of instillation to NPWT (NPWTi) is a new method for treating severe wounds, in particular, limb lesions at high risk for amputation. This therapy helps to deliver instillation fluid automatically into the contaminated wound, before application of negative pressure. These steps, repeated cyclically, help to remove infectious material, leading to a better moist environment, a necessary condition for wound healing. We report our experience of treating three patients with complex wounds and associated noble structure exposition conservatively with NPWTi and flap coverage. In a long-term follow-up (5 years), we were able to achieve a stable surgery reconstruction on preserved limbs, without evidence of chronic infection and other sequelae or complications. Despite the fact that our experience is limited , as it is based on only a few cases, it suggests how NPWTi could be considered useful in a conservative approach to the treatment of acute complex wounds of the lower extremities. In these patients with high risk of amputation, a long-term follow-up becomes fundamental in order to evaluate wound bed status after NPTWi.

Quality of Life among Egyptian Patients with Upper and Lower Limb Amputation: Sex Differences

Background. Limb amputation is a life-changing event that can cause significant disruptions in many important areas of existence. Aim of this study. To evaluate the quality of life (QOL) of patients with limb amputation and identify the factors affecting the quality of life of patients with limb amputation among Egyptian patients. Research Design. It was a descriptive exploratory design. Setting. The study was conducted in Orthopedics and Surgical Department in Emergency Hospital at Mansoura University Hospitals. Sample. A sample of convenience of 100 adult male and female patients who met the inclusion criteria was included. Tools. (a) Structured interview questionnaire (SIQ) was used to collect personal data, (b) short form (36) health status questionnaires: this part was utilized to assess the quality of life among Egyptian patients with amputation. Results. The result of this study indicates that most participants experienced a change in the quality of life. There is a statistically significant difference between total QOL aspects and each of the following: age, gender, educational level, and type of work. Conclusion. Limb amputation tends to cause increased disability for those amputated patients. The age, gender, place of amputation, and marital status are found as statistically significant factors with physical component and psychological component.

A systematic review of functional and quality of life assessment after major lower extremity amputation

BACKGROUND

When judging the success or failure of major lower extremity (MLE) amputation, the assessment of appropriate functional and quality of life (QOL) outcomes is paramount. The heterogeneity of the scales and tests in the current literature is confusing and makes it difficult to compare results. We provide a primer for outcome assessment after amputation and assess the need for the additional development of novel instruments.

METHODS

MEDLINE, EMBASE, and Google Scholar were searched for all studies using functional and QOL instruments after MLE amputation. Assessment instruments were divided into functional and QOL categories. Within each category, they were subdivided into global and amputation-specific instruments. An overall assessment of instrument quality was obtained.

RESULTS

The initial search revealed 746 potential studies. After a review of abstracts, 102 were selected for full review, and 40 studies were then included in this review. From the studies, 21 different assessment instruments were used 63 times. There were 14 (67%) functional measures and 7 (33%) QOL measures identified. Five (36%) of the functional instruments and 3 (43%) of the QOL measures were specific for MLE amputees. Sixteen instruments were used >1 time, but only 5 instruments were used >3 times. An additional 5 instruments were included that were deemed important by expert opinion. The 26 assessment instruments were rated. Fourteen of the best-rated instruments were then described.

CONCLUSIONS

The heterogeneity of instruments used to measure both functional and QOL outcomes make it difficult to compare MLE amputation outcome studies. Future researchers should seek to use high-quality instruments. Clinical and research societies should endorse the best validated instruments for future use in order to strengthen overall research in the field.

Aluminium foil for the prevention of post-amputation pain: a randomised, double-blinded, placebo-controlled, crossover trial

INTRODUCTION

Phantom limb pain (PLP) is a painful sensation perceived in the missing limb after amputation. The underlying pathophysiology remains unclear. Until recently, only opioid analgesics have been proven to be effective in prospective studies. Anecdotally, patients with PLP employ self-help measures, sometimes including 'wrapping up' or rubbing their stump with aluminium foil for relief. Our hypothesis is that wrapping an amputation stump with aluminium foil perioperatively will prevent PLP in the postoperative period.

METHODS

From September 2007 to September 2009, 32 consecutive patients were included in a crossover, double-blinded, randomised clinical trial. Perioperative fitting of an aluminium stump bandage was compared with a placebo paper foil. Scores were noted daily in a variable diary. The observation period was 2 weeks: in the first week participants were double blinded, and in the second week there was a change of bandage from aluminium to placebo or vice versa. A visual analogue scale (VAS) score was used as primary research variable. Secondary variables were use of analgesics, VAS measures of wound pain and the incidence of wound infections. Statistical analysis was done by means of Student's t-test for non-paired observations.

RESULTS

Baseline characteristics were similar between groups. A period effect (p= 0.84) and treatment-period interaction (p = 0.79) were not present. There was no significant difference (mean difference 0.42) between both treatments in PLP VAS scores (95% CI -2.56 to -1.81, p = 0.71). VAS measure of wound pain showed no significant difference between both groups (mean difference 0.34, 95% CI -2.32 to -1.66, p = 0.72). Also, the other secondary endpoints did not differ.

CONCLUSION

Patients receiving an aluminium foil stump wrapping do not experience less phantom pain than with a placebo.

Optimization of the visco-elastic parameters describing the heel-region of a prosthesis

Although compliance (visco-elasticity) of a prosthesis has the potential to affect clinically relevant aspects of a lower extremity amputee's gait, it is currently unknown what the compliant parameter values should be. Here, a simple dynamical model is used to approximate walking with a compliant prosthesis. An exhaustive search is used to identify the optimal compliant element parameter set in terms of the model's stability as measured by the reciprocal of the gait sensitivity norm (rGSN). We identified a parameter set yielding a 17% larger rGSN than the best commercially available prosthesis; however, this is unlikely to be the global optimum for the physically realizable visco-elastic parameter space. Due to the nonlinear effects of the compliant elements, it is difficult to make generalizations about speed and step length, such difficulties are not present with simpler contact models. However, there is some evidence to support a possible trade-off between efficiency and stability.