The Below-Knee Amputation: To Amputate or Palliate?

Achieving Functional Outcomes after Surgical Management of Catastrophic Vasopressor-induced Limb Ischemia

Vasopressor-induced limb ischemia is an unfortunate complication that can occur in patients treated for septic shock. Current literature lacks surgical treatment recommendations for this condition, besides amputation. We describe various reconstructive surgeries and functional outcomes in patients treated surgically for vasopressor-induced limb ischemia.

Methods

We retrospectively reviewed patients who were treated for septic shock and developed vasopressor-induced limb ischemia at our tertiary referral academic medical center. We reviewed presentation, treatment, surgical outcomes, and long-term functional outcomes.

Results

We present three previously healthy patients who developed gangrene of multiple limbs following the use of vasopressors to treat septic shock. Each patient underwent amputations or limb salvage procedures.

Conclusions

Limb ischemia is a devastating complication that can occur after prolonged vasopressor use. The decision to proceed with limb salvage versus amputation of ischemic extremities should be tailored to the individual patient. The main objective should be for the patient to obtain optimal function and quality of life, regardless of the type of surgery.

A predictive score for 30-day survival for patients undergoing major lower limb amputation for peripheral arterial obstructive disease

To analyze outcomes following major lower extremity amputations (mLEAs) for peripheral arterial obstructive disease, gangrene, infected non-healing wound and to create a risk prediction scoring system for 30-day mortality. In this single-center, retrospective, observational cohort study. All patients treated with above-the-knee amputation (AKA) or below-the-knee amputation (BKA) between January 1st, 2010 and June 30th, 2018 were identified. The primary outcome of interest was early (≤ 30 days) mortality. Secondary outcomes were postoperative complications and freedom from amputation stump revision/failure. We identified 310 (77.7%) mLEAs performed on 286 patients. There were 188 (65.7%) men and 98 (34.3%) women with a median age of 79 years (IQR, 69–83 years). We performed 257 (82.9%) AKA and 53 (17.1%) BKA. There were 49 (15.8%) early deaths, which did not differ among the age quartiles of this cohort (15.4% vs. 14.3% vs. 15.4% vs. 19.5%, P = 0.826). Binary logistic regression analysis identified age > 80 years (OR 2.24, 95% CI 1.17–4.31; P = 0.015), chronic obstructive pulmonary disease (OR 2.12, 95% CI 1.11–4.06; P = 0.023), and hemodialysis (OR 2.52, 95% CI 1.15–5.52; P = 0.021) to be associated with early mortality. The final score (range 0–10) identified two subgroups with different mortality at 30 days: lower-risk (score < 4, 10.8%), and higher-risk (score ≥ 4: 28.7%; OR 3.2, 95% CI 1.63–6.32; P < 0.001). In our experience, mLEAs still have a 14% mortality rate over the years. Our lower-risk group (score < 4) is characterized by a lower rate of perioperative death and longer survival.

Bucket-Handle Meniscus Repair in a Below-Knee Amputee: A Case Report

CASE

We report a case of a right knee lateral bucket-handle meniscal tear repair in a 25-year-old woman bilateral below-knee amputee. At the 4-year follow-up, the patient was ambulatory in a prosthesis with a successful outcome.

CONCLUSION

Meniscus repair in below-knee amputees requires careful evaluation and surgical management. Specific consideration should be given to evaluating limb alignment, maintaining the stump integrity, surgical technique, modified bracing, and rehabilitation. This case report demonstrates that bucket-handle meniscus repair can be successful in a below-knee amputee.

Do toe blood pressures predict healing after minor lower limb amputation in people with diabetes? A systematic review and meta-analysis

PURPOSE OF STUDY

To investigate toe systolic blood pressure and/or toe-brachial pressure index in predicting healing post minor diabetic foot amputations.

KEY METHODS

A systematic search of EMBASE and PubMed (including Medline and The Cochrane Library) was conducted from database inception to 9 March 2020. Two authors independently reviewed and selected relevant studies. Quality was assessed with a modified Critical Appraisal Skill Programme checklist.

MAIN RESULTS

Ten studies met the inclusion criteria. Nine studies investigating toe systolic blood pressure reported healing occurred at mean toe systolic blood pressure values ⩾30 mmHg, ranging between 30 and 83.6 mmHg. The meta-analysis (four studies) found toe systolic blood pressure <30 mmHg had 2.09 times the relative risk of non-healing post amputation, compared to toe systolic blood pressure ⩾30 mmHg (relative risk = 2.09, 95% confidence interval: 1.37-3.20, p = 0.001). Two studies investigating toe-brachial pressure index report successful healing where toe-brachial pressure index >0.2, with one study reporting a higher value of 0.8.

MAIN CONCLUSIONS

Successful post-amputation healing outcomes were reported at mean toe systolic blood pressure ⩾30 mmHg, and the results varied considerably between the studies. Further research should identify whether variables, including amputation level, method of wound closure and length of post-operative follow-up periods, affect the values of toe systolic blood pressure and toe-brachial pressure index observed in this review.

Mobility Analysis of AmpuTees (MAAT 6): Mobility, Satisfaction, and Quality of Life among Long-Term Dysvascular/Diabetic Prosthesis Users-Results of a Cross-Sectional Analysis

Objective

The aim of this study was to establish the mobility, satisfaction, and quality of life (QoL) among prosthesis users with dysvascular/diabetic amputation at both acute and long-term phases of prosthetic rehabilitation.

Methods

This is a multisite, cross-sectional outcomes analysis. A total of 341 individuals met the inclusion/exclusion criteria. Individuals were grouped into acute phases (0–3 months [n = 24], 4–6 months [n = 72]) and chronic phases (24–36 months [n = 91], 37–48 months [n = 53], 49–60 months [n = 47], and 60–84 months [n = 54]) after amputation. Mobility was measured with the Prosthetic Limb Users Survey of Mobility (PLUS-M), whereas QoL and satisfaction (Sat) were reported using 10-point scales adapted from the Prosthesis Evaluation Questionnaire–Well-Being (PEQ-WB). Composite PEQ-WB scores were also compared.

Results

The average mobility, QoL, and Sat among prosthesis users was, respectively, 44.8 ± 10.6, 7.6 ± 2.2, and 7.6 ± 2.2. There were no observed differences in mobility (F_5,330 = 1.52, P = 0.18), QoL (F_5,333 = 0.78, P = 0.57), or PEQ-WB (F_5,335 = 1.618, P = 0.155) between any groups. For Sat, there was a group difference (F_5,334 = 2.44, P = 0.03) as individuals appear to experience an initial increase in Sat with receipt of a prosthesis (0–3 months) compared with 25 to 36 months (P = 0.005), 49 to 60 months (P = 0.008), and 61 to 84 months (P = 0.009).

Conclusions

Those individuals with amputation secondary to dysvascular disease and diabetes who continue to participate in prosthetic rehabilitation appear to experience levels of mobility, Sat, and QoL 7 years after amputation comparable to that reported in the first 6 months postamputation. There may be a modest increase in Sat with receipt of an initial prosthesis, potentially due to an increased optimism for one's situation. Notably, the mobility levels observed in the dysvascular population through a range of long-term postamputation periods remain within a single standard deviation of the population mean for individuals with a lower-limb amputation using a prosthesis for mobility.

Innovative Techniques for Maximizing Limb Salvage and Function

Concurrent injuries to multiple extremities present unique challenges to the reconstructive surgeon. The primary goal in such scenarios is to optimize functional outcomes. The goal of this article is to present an overview of various techniques necessary to provide sufficient soft tissue and preserve amputation limb lengths and function. The concept of innovative techniques for maximizing limb savage and function is presented using an index patient with multiple extremity third- and fourth-degree burn injuries resulting in nonsalvageable lower extremities and severe left-hand wounds. A review of other potential innovative techniques is discussed. The burn injury resulted in a need for bilateral guillotine below-knee amputations. Above-knee amputation was avoided in the left leg using a parascapular free fasciocutaneous flap, while through-knee amputation was preferred to above-knee amputation in the right leg. The preservation of areas with questionable viability resulted in salvaging the left hand of the patient using digital palmar flaps to resurface the dorsum with creation of a first web-space. Maintenance of maximal viable length of limbs and any residual function in the limbs can be of significant functional benefit to multiple limb amputation patients. Maximizing the limb length in such patients is critical, and typical "rules" that have traditionally been utilized to minimize numbers of operations and optimize prosthetic fit may not apply.

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.

Management of advanced plexiform neurofibromatosis of the foot presenting with skeletal deformation and intractable pain: an indication for proximal amputation

Plexiform neurofibromas of the foot are rare and often present with significant pain, deformity, and functional impairment secondary to their locally invasive behavior. While treatment has traditionally focused on attempts at radical resection, a lack of consensus among surgeons has hindered the establishment of a well-defined algorithm to guide the management of these highly co-morbid peripheral nerve sheath tumors. We present the case of an advanced plexiform neurofibroma of the right foot in a 24-year-old male with neurofibromatosis type 1. The patient presented following accelerated tumor growth with extensive osseous erosion, intractable pain, and progressive ankle instability that limited his capacity to ambulate and wear shoes. A modified transtibial amputation with a vascularized fibular bone graft (Ertl procedure) was performed without complication. Following graduated rehabilitation, postoperatively, the patient regained functional independence and was able to ambulate without pain in a customized prosthesis after 3 months. Plexiform neurofibromas of the foot present a complex challenge for foot and ankle surgeons. On the basis of our experience and previously reported cases, we advocate for amputation over aggressive attempts at advanced limb salvage for patients with extensive skeletal destruction, joint instability, and/or intractable pain caused by tumor mass effect.