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Cavalcanti NA, Martini K, Götschi T, Krähenbühl N, Schöni M, Waibel FWA. Second Metatarsal Length and Transfer Ulcers After First Metatarsal Amputation in Diabetic Foot Infections. Foot Ankle Int 2024; 45:474-484. [PMID: 38497521 PMCID: PMC11083743 DOI: 10.1177/10711007241232970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
BACKGROUND Plantar transfer ulcers (TUs) underneath the second metatarsal head are frequent after first metatarsal ray amputations due to diabetic foot infections. Whether the second metatarsal length (2ML) is associated with TU occurrence in these patients is unclear. This study evaluated whether 2ML is associated with TU occurrence after first-ray amputations and whether ulcer-free survival is shorter in patients with "excess" 2ML. METHODS Forty-two patients with a mean age of 67 (range 33-93) years, diabetes, and first metatarsal ray amputation (first amputation at the affected foot) were included. Two independent readers measured the 2ML using the Coughlin method. A protrusion of more than 4.0 mm of the second metatarsal was defined as "excess" 2ML. The effect of 2ML on ulcer occurrence was analyzed using a multivariate Cox regression model. A Kaplan-Meier curve for TU-free survival was constructed comparing the 2 groups of "normal" (n = 21) and "excess" 2ML (n = 21). RESULTS Interrater reliability was excellent. TUs underneath the second metatarsal occurred in 15 (36%) patients. In agreement with our hypothesis, 2ML was nonsignificantly different in patients with TUs, recording a mean of 5.3 (SD 2.5) mm, compared to patients without 4.0 (SD 2.3) mm (hazard ratio [HR] 1.12, 95% CI 0.89-1.41), whereas insulin dependence was associated with ulcer occurrence (HR 0.33, 95% CI 0.11-0.99). CONCLUSION In our relatively small study population with a cutoff level of 4 mm for excess 2ML, ulcer-free survival was similar in patients with "normal" and "excess" 2ML. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
| | - Katharina Martini
- Department of Radiology, Balgrist University Hospital, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedics, Balgrist University Hospital, Zurich, Switzerland
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Nicola Krähenbühl
- Department of Orthopaedics, University Hospital Basel, Basel, Switzerland
| | - Madlaina Schöni
- Department of Orthopaedics, Balgrist University Hospital, Zurich, Switzerland
| | - Felix W. A. Waibel
- Department of Orthopaedics, Balgrist University Hospital, Zurich, Switzerland
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Waibel FWA, Uçkay I, Soldevila-Boixader L, Sydler C, Gariani K. Current knowledge of morbidities and direct costs related to diabetic foot disorders: a literature review. Front Endocrinol (Lausanne) 2024; 14:1323315. [PMID: 38298183 PMCID: PMC10829909 DOI: 10.3389/fendo.2023.1323315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/29/2023] [Indexed: 02/02/2024] Open
Abstract
Diabetes is a chronic disease associated with numerous complications including diabetic foot disorders, which are associated with significant morbidity and mortality as well as high costs. The costs associated with diabetic foot disorders comprise those linked to care (direct) and loss of productivity and poor quality of life (indirect). Due to the constant increase in diabetes prevalence, it is expected that diabetic foot disorder will require more resources, both in terms of caregivers and economically. We reviewed findings on management, morbidity, mortality, and costs related to diabetic foot disorder.
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Affiliation(s)
- Felix W. A. Waibel
- Orthopaedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Ilker Uçkay
- Infectiology, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Laura Soldevila-Boixader
- Infectious Diseases, Internal Medicine Department, Consorci Sanitari Integral-CSI, Sant Joan Despí Hospital, Barcelona, Spain
| | - Christina Sydler
- Orthopaedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Karim Gariani
- Service of Endocrinology, Diabetes, Nutrition, and Therapeutic Education, Faculty of Medicine, Geneva University Hospitals, Geneva, Switzerland
- Diabetes Center of the Faculty of Medicine, University of Geneva Medical School, Geneva, Switzerland
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Schöni M, Soldevila-Boixader L, Böni T, Muñoz Laguna J, Uçkay I, Waibel FWA. Comparative Efficacy of Conservative Surgery vs Minor Amputation for Diabetic Foot Osteomyelitis. Foot Ankle Int 2023; 44:1142-1149. [PMID: 37724863 PMCID: PMC10666512 DOI: 10.1177/10711007231194046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
BACKGROUND There is uncertainty regarding the optimal surgical intervention for diabetic foot osteomyelitis (DFO). Conservative surgery-amputation-free resection of infected bone and soft tissues-is gaining traction as an alternative to minor amputation. Our primary objective was to explore the comparative effectiveness of conservative surgery and minor amputations in clinical failure risk 1 year after index intervention. We also aimed to explore microbiological recurrence at 1 year, and revision surgery risk over a 10-year study period. METHODS Retrospective, single-center chart review of DFO patients undergoing either conservative surgery or minor amputation. We used multivariable Cox regression and Kaplan-Meier estimates to explore the effect of surgical intervention on clinical failure (recurrent diabetic foot infection at surgical site within 1 year after index operation), microbiological recurrence at 1 year, and revision surgery risk over a 10-year follow-up period. RESULTS 651 patients were included (conservative surgery, n = 121; minor amputation, n = 530). Clinical failure occurred in 34 (28%) patients in the conservative surgery group, and in 111 (21%) of the minor amputation group at 1 year (P = .09). After controlling for potential confounders, we found no association between conservative surgery and clinical failure at 1 year (adjusted hazard ratio [HR] 1.3, 95% CI 0.8-2.1). We found no between-group differences in microbiological recurrence at 1 year (conservative surgery: 8 [6.6%]; minor amputation: 33 [6.2%]; P = .25; adjusted HR 1.1, 95% CI 0.5-2.6). Over the 10-year period, the conservative group underwent significantly more revision surgeries (conservative surgery: 85 [70.2%]; minor amputation: 252 [47.5%]; P < .01; adjusted HR 1.3, 95% CI 0.9-1.8). CONCLUSION We found that with comorbidity-based patient selection, conservative surgery in the treatment of DFO was associated with the same rates of clinical failure and microbiological recurrence at 1 year, but with significantly more revision surgeries during follow-up, compared with minor amputations. LEVEL OF EVIDENCE Level III, retrospective comparative effectiveness study.
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Affiliation(s)
- Madlaina Schöni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | | | - Thomas Böni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Javier Muñoz Laguna
- EBPI-UWZH Musculoskeletal Epidemiology Research Group, University of Zurich and Balgrist University Hospital, Zurich, Switzerland
- Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Zurich, Zurich, Switzerland
- University Spine Centre Zurich (UWZH), Balgrist University Hospital and University of Zurich, Zurich, Switzerland
| | - Ilker Uçkay
- Department of Infectious Diseases, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Felix W. A. Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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Nieuwland AJ, Waibel FWA, Flury A, Lisy M, Berli MC, Lipsky BA, Uçkay İ, Schöni M. Initial antibiotic therapy for postoperative moderate or severe diabetic foot infections: Broad versus narrow spectrum, empirical versus targeted. Diabetes Obes Metab 2023; 25:3290-3297. [PMID: 37533158 DOI: 10.1111/dom.15228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 08/04/2023]
Abstract
AIM To retrospectively evaluate clinical and microbiological outcomes after combined surgical and medical therapy for diabetic foot infections (DFIs), stratifying between the empirical versus the targeted nature, and between an empirical broad versus a narrow-spectrum, antibiotic therapy. METHODS We retrospectively assessed the rate of ultimate therapeutic failures for each of three types of initial postoperative antibiotic therapy: adequate empirical therapy; culture-guided therapy; and empirical inadequate therapy with a switch to targeted treatment based on available microbiological results. RESULTS We included data from 332 patients who underwent 716 DFI episodes of surgical debridement, including partial amputations. Clinical failure occurred in 40 of 194 (20.6%) episodes where adequate empirical therapy was given, in 77 of 291 (26.5%) episodes using culture-guided (and correct) therapy from the start, and in 73 of 231 (31.6%) episodes with switching from empirical inadequate therapy to culture-targeted therapy. Equally, a broad-spectrum antibiotic choice could not alter this failure risk. Group comparisons, Kaplan-Meier curves and Cox regression analyses failed to show either statistical superiority or inferiority of any of the initial antibiotic strategies. CONCLUSIONS In this study, the microbiological adequacy of the initial antibiotic regimen after (surgical) debridement for DFI did not alter therapeutic outcomes. We recommend that clinicians follow the stewardship approach of avoiding antibiotic de-escalation and start with a narrow-spectrum regimen based on the local epidemiology.
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Affiliation(s)
- Arend J Nieuwland
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Andreas Flury
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Marcus Lisy
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Martin C Berli
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Benjamin A Lipsky
- Department of Medicine, University of Washington, Seattle, Washington, USA
| | - İlker Uçkay
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Infectiology, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Unit for Clinical and Applied Research, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Madlaina Schöni
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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Berli MC, Azaiez N, Götschi T, Pfirrmann CWA, Uçkay I, Sutter R, Waibel FWA, Rosskopf AB. Muscle atrophy in diabetic patients with Charcot foot: a case-control study. Skeletal Radiol 2023; 52:1661-1668. [PMID: 36997748 PMCID: PMC10348944 DOI: 10.1007/s00256-023-04328-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/19/2023] [Accepted: 03/19/2023] [Indexed: 04/01/2023]
Abstract
PURPOSE To evaluate the distribution and severity of muscle atrophy in diabetic patients with active Charcot foot (CF) compared to diabetic patients without CF. Furthermore, to correlate the muscle atrophy with severity of CF disease. MATERIAL/METHODS In this retrospective study, MR images of 35 diabetic patients (21 male, median:62.1 years ± 9.9SD) with active CF were compared with an age- and gender-matched control group of diabetic patients without CF. Two readers evaluated fatty muscle infiltration (Goutallier-classification) in the mid- and hindfoot. Furthermore, muscle trophic (cross-sectional muscle area (CSA)), intramuscular edema (none/mild versus moderate/severe), and the severity of CF disease (Balgrist Score) were assessed. RESULTS Interreader correlation for fatty infiltration was substantial to almost perfect (kappa-values:0.73-1.0). Frequency of fatty muscle infiltration was high in both groups (CF:97.1-100%; control:77.1-91.4%), but severe infiltration was significantly more frequent in CF patients (p-values: < 0.001-0.043). Muscle edema was also frequently seen in both groups, but significantly more often in the CF group (p-values: < 0.001-0.003). CSAs of hindfoot muscles were significantly smaller in the CF group. For the flexor digitorum brevis muscle, a cutoff value of 139 mm2 (sensitivity:62.9%; specificity:82.9%) in the hindfoot was found to differentiate between CF disease and the control group. No correlation was seen between fatty muscle infiltration and the Balgrist Score. CONCLUSION Muscle atrophy and muscle edema are significantly more severe in diabetic patients with CF disease. Muscle atrophy does not correlate with the severity of active CF disease. A CSA < 139 mm2 of the flexor digitorum brevis muscle in the hindfoot may indicate CF disease.
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Affiliation(s)
- Martin C Berli
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Nicolas Azaiez
- Radiology, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Tobias Götschi
- Unit for Clinical and Applied Research (UCAR), Balgrist University Hospital, Zurich, Switzerland
- Institute for Biomechanics, Swiss Federal Institute of Technology, Zurich, Switzerland
| | | | - Ilker Uçkay
- Unit for Clinical and Applied Research (UCAR), Balgrist University Hospital, Zurich, Switzerland
| | - Reto Sutter
- Radiology, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Andrea B Rosskopf
- Radiology, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland.
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Waibel FWA, Weber S, Selman F, Götschi T, Berli MC, Böni T, Schöni M. No Difference in Risk of Amputation or Frequency of Surgical Interventions Between Patients With Diabetic and Nondiabetic Charcot Arthropathy. Clin Orthop Relat Res 2023; 481:1560-1568. [PMID: 36692512 PMCID: PMC10344513 DOI: 10.1097/corr.0000000000002546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 12/15/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND The cause of Charcot neuro-osteoarthropathy (CN) is diabetes in approximately 75% of patients. Most reports on the clinical course and complications of CN focus on diabetic CN, and reports on nondiabetic CN are scarce. No study, to our knowledge, has compared the clinical course of patients initially treated nonoperatively for diabetic and nondiabetic CN. QUESTIONS/PURPOSES Among patients with CN, are there differences between patients with diabetes and those without in terms of (1) the frequency of major amputation as ascertained by a competing risks survivorship estimator; (2) the frequency of surgery as ascertained by a competing risks survivorship estimator; (3) frequency of reactivation, as above; or (4) other complications (contralateral CN development or ulcers)? METHODS Between January 1, 2006, and December 31, 2018, we treated 199 patients for diabetic CN. Eleven percent (22 of 199) were lost before the minimum study follow-up of 2 years or had incomplete datasets and could not be analyzed, and another 9% (18 of 199) were excluded for other prespecified reasons, leaving 80% (159 of 199) for analysis in this retrospective study at a mean follow-up duration since diagnosis of 6 ± 4 years. During that period, we also treated 78 patients for nondiabetic Charcot arthropathy. Eighteen percent (14 of 78) were lost before the minimum study follow-up and another 5% (four of 78 patients) were excluded for other prespecified reasons, leaving 77% (60 of 78) of patients for analysis here at a mean of 5 ± 3 years. Patients with diabetic CN were younger (59 ± 11 years versus 68 ± 11 years; p < 0.01), more likely to smoke cigarettes (37% [59 of 159] versus 20% [12 of 60]; p = 0.02), and had longer follow-up (6 ± 4 years versus 5 ± 3 years; p = 0.02) than those with nondiabetic CN. Gender, BMI, overall renal failure, dialysis, and presence of peripheral arterial disease did not differ between the groups. Age difference and length of follow-up were not considered disqualifying problems because of the later onset of idiopathic neuropathy and longer available patient follow-up in patients with diabetes, because our program adheres to the follow-up recommendations suggested by the International Working Group on the Diabetic Foot. Treatment was the same in both groups and included serial total-contact casting and restricted weightbearing until CN had resolved. Then, patients subsequently transitioned to orthopaedic footwear. CN reactivation was defined as clinical signs of the recurrence of CN activity and confirmation on MRI. Group-specific risks of the frequencies of major amputation, surgery, and CN reactivation were calculated, accounting for competing events. Group comparisons and confounder analyses were conducted on these data with a Cox regression analysis. Other complications (contralateral CN development and ulcers) are described descriptively to avoid pooling of complications with varying severity, which could be misleading. RESULTS The risk of major amputation (defined as an above-ankle amputation), estimated using a competing risks survivorship estimator, was not different between the diabetic CN group and nondiabetic CN group at 10 years (8.8% [95% confidence interval 4.2% to 15%] versus 6.9% [95% CI 0.9% to 22%]; p = 0.4) after controlling for potentially confounding variables such as smoking and peripheral artery disease. The risk of any surgery was no different between the groups as estimated by the survivorship function at 10 years (53% [95% CI 42% to 63%] versus 58% [95% CI 23% to 82%]; p = 0.3), with smoking (hazard ratio 2.4 [95% CI 1.6 to 3.6]) and peripheral artery disease (HR 2.2 [95% CI 1.4 to 3.4]) being associated with diabetic CN. Likewise, there was no between-group difference in CN reactivation at 10 years (16% [95% CI 9% to 23%] versus 11% [95% CI 4.5% to 22%]; p = 0.7) after controlling for potentially confounding variables such as smoking and peripheral artery disease. Contralateral CN occurred in 17% (27 of 159) of patients in the diabetic group and in 10% (six of 60) of those in the nondiabetic group. Ulcers occurred in 74% (117 of 159) of patients in the diabetic group and in 65% (39 of 60) of those in the nondiabetic group. CONCLUSION Irrespective of whether the etiology of CN is diabetic or nondiabetic, our results suggest that orthopaedic surgeons should use similar nonsurgical treatments, with total-contact casting until CN activity has resolved, and then proceed with orthopaedic footwear. A high frequency of foot ulcers must be anticipated and addressed as part of the treatment approach. LEVEL OF EVIDENCE Level III, prognostic study.
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Affiliation(s)
- Felix W. A. Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Sabrina Weber
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Farah Selman
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedic Surgery, University of Zurich, Institute for Biomechanics, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Martin C. Berli
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Thomas Böni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Madlaina Schöni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
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Soldevila-Boixader L, Murillo O, Waibel FWA, Huber T, Schöni M, Lalji R, Uçkay I. The Epidemiology of Antibiotic-Related Adverse Events in the Treatment of Diabetic Foot Infections: A Narrative Review of the Literature. Antibiotics (Basel) 2023; 12:antibiotics12040774. [PMID: 37107136 PMCID: PMC10135215 DOI: 10.3390/antibiotics12040774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/16/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
The use of antibiotics for the treatment of diabetic foot infections (DFIs) over an extended period of time has been shown to be associated with adverse events (AEs), whereas interactions with concomitant patient medications must also be considered. The objective of this narrative review was to summarize the most frequent and most severe AEs reported in prospective trials and observational studies at the global level in DFI. Gastrointestinal intolerances were the most frequent AEs, from 5% to 22% among all therapies; this was more common when prolonged antibiotic administration was combined with oral beta-lactam or clindamycin or a higher dose of tetracyclines. The proportion of symptomatic colitis due to Clostridium difficile was variable depending on the antibiotic used (0.5% to 8%). Noteworthy serious AEs included hepatotoxicity due to beta-lactams (5% to 17%) or quinolones (3%); cytopenia's related to linezolid (5%) and beta-lactams (6%); nausea under rifampicin, and renal failure under cotrimoxazole. Skin rash was found to rarely occur and was commonly associated with the use of penicillins or cotrimoxazole. AEs from prolonged antibiotic use in patients with DFI are costly in terms of longer hospitalization or additional monitoring care and can trigger additional investigations. The best way to prevent AEs is to keep the duration of antibiotic treatment short and with the lowest dose clinically necessary.
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Affiliation(s)
- Laura Soldevila-Boixader
- Infectious Diseases Service, IDIBELL-Hospital Universitari Bellvitge, Universitat de Barcelona, Feixa Llarga s/n, Hospitalet de Llobregat, 08907 Barcelona, Spain
- Research Network for Infectious Diseases (CIBERINFEC), ISCIII, 28029 Madrid, Spain
- Infectiology, Unit for Clinical and Applied Research, Balgrist University Hospital, 8008 Zurich, Switzerland
| | - Oscar Murillo
- Infectious Diseases Service, IDIBELL-Hospital Universitari Bellvitge, Universitat de Barcelona, Feixa Llarga s/n, Hospitalet de Llobregat, 08907 Barcelona, Spain
- Research Network for Infectious Diseases (CIBERINFEC), ISCIII, 28029 Madrid, Spain
| | - Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Tanja Huber
- Hospital Pharmacy, Balgrist University Hospital, 8008 Zurich, Switzerland
| | - Madlaina Schöni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Rahim Lalji
- EBPI-UWZH Musculoskeletal Epidemiology Research Group, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
- Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Zurich, 8008 Zurich, Switzerland
- University Spine Centre Zurich (UWZH), Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Ilker Uçkay
- Infectiology, Unit for Clinical and Applied Research, Balgrist University Hospital, 8008 Zurich, Switzerland
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
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Altmann D, Waibel FWA, Forgo G, Grigorean A, Lipsky BA, Uçkay I, Schöni M. Timing of Revascularization and Parenteral Antibiotic Treatment Associated with Therapeutic Failures in Ischemic Diabetic Foot Infections. Antibiotics (Basel) 2023; 12:antibiotics12040685. [PMID: 37107047 PMCID: PMC10135376 DOI: 10.3390/antibiotics12040685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/25/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
For ischemic diabetic foot infections (DFIs), revascularization ideally occurs before surgery, while a parenteral antibiotic treatment could be more efficacious than oral agents. In our tertiary center, we investigated the effects of the sequence between revascularization and surgery (emphasizing the perioperative period of 2 weeks before and after surgery), and the influence of administering parenteral antibiotic therapy on the outcomes of DFIs. Among 838 ischemic DFIs with moderate-to-severe symptomatic peripheral arterial disease, we revascularized 608 (72%; 562 angioplasties, 62 vascular surgeries) and surgically debrided all. The median length of postsurgical antibiotic therapy was 21 days (given parenterally for the initial 7 days). The median time delay between revascularization and debridement surgery was 7 days. During the long-term follow-up, treatment failed and required reoperation in 182 DFI episodes (30%). By multivariate Cox regression analyses, neither a delay between surgery and angioplasty (hazard ratio 1.0, 95% confidence interval 1.0–1.0), nor the postsurgical sequence of angioplasty (HR 0.9, 95% CI 0.5–1.8), nor long-duration parenteral antibiotic therapy (HR 1.0, 95% CI 0.9–1.1) prevented failures. Our results might indicate the feasibility of a more practical approach to ischemic DFIs in terms of timing of vascularization and more oral antibiotic use.
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Affiliation(s)
- Dominique Altmann
- Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Felix W. A. Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Gabor Forgo
- Department of Angiology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Alexandru Grigorean
- Department of Angiology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Benjamin A. Lipsky
- Department of Medicine, University of Washington, Seattle, WA 98195-6420, USA
| | - Ilker Uçkay
- Unit for Clinical and Applied Research, Infectiology, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Madlaina Schöni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, 8008 Zurich, Switzerland
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Unterfrauner I, Andronic O, Viehöfer AF, Wirth SH, Berli MC, Waibel FWA. Ulcer occurrence on adjacent toes and hallux valgus deformity after amputation of the second toe in diabetic patients. J Orthop Surg Res 2023; 18:99. [PMID: 36782206 PMCID: PMC9926725 DOI: 10.1186/s13018-023-03577-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 02/03/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND Amputation of the second toe is associated with destabilization of the first toe. Possible consequences are hallux valgus deformity and subsequent pressure ulcers on the lateral side of the first or on the medial side of the third toe. The aim of this study was to investigate the incidence and possible influencing factors of interdigital ulcer development and hallux valgus deformity after second toe amputation. METHODS Twenty-four cases of amputation of the second toe between 2004 and 2020 (mean age 68 ± 12 years; 79% males) were included with a mean follow-up of 36 ± 15 months. Ulcer development on the first, third, or fourth toe after amputation, the body mass index (BMI) and the amputation level (toe exarticulation versus transmetatarsal amputation) were recorded. Pre- and postoperative foot radiographs were evaluated for the shape of the first metatarsal head (round, flat, chevron-type), the hallux valgus angle, the first-second intermetatarsal angle, the distal metatarsal articular angle and the hallux valgus interphalangeal angle by two orthopedic surgeons for interobserver reliability. RESULTS After amputation of the second toe, the interdigital ulcer rate on the adjacent toes was 50% and the postoperative hallux valgus rate was 71%. Neither the presence of hallux valgus deformity itself (r = .19, p = .37), nor the BMI (r = .09, p = .68), the shape of the first metatarsal head (r = - .09, p = .67), or the amputation level (r = .09, p = .69) was significantly correlated with ulcer development. The interobserver reliability of radiographic measurements was high, oscillating between 0.978 (p = .01) and 0.999 (p = .01). CONCLUSIONS The interdigital ulcer rate on the first or third toe after second toe amputation was 50% and hallux valgus development was high. To date, evidence on influencing factors is lacking and this study could not identify parameters such as the BMI, the shape of the first metatarsal head or the amputation level as risk factors for the development of either hallux valgus deformity or ulcer occurrence after second toe amputation. TRIAL REGISTRATION BASEC-Nr. 2019-01791.
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Affiliation(s)
- Ines Unterfrauner
- Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.
| | - Octavian Andronic
- grid.7400.30000 0004 1937 0650Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Arnd F. Viehöfer
- grid.7400.30000 0004 1937 0650Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Stephan H. Wirth
- grid.7400.30000 0004 1937 0650Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Martin C. Berli
- grid.7400.30000 0004 1937 0650Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Felix W. A. Waibel
- grid.7400.30000 0004 1937 0650Orthopedic Department, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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10
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Berli MC, Rancic Z, Schöni M, Götschi T, Schenk P, Kabelitz M, Böni T, Waibel FWA. Salami-Tactics: when is it time for a major cut after multiple minor amputations? Arch Orthop Trauma Surg 2023; 143:645-656. [PMID: 34370043 PMCID: PMC9925494 DOI: 10.1007/s00402-021-04106-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/26/2021] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Repetitive minor amputations carry the concomitant risks of multiple surgical procedures, major amputations have physical and economical major drawbacks. The aim of this study was to evaluate whether there is a distinct number of minor amputations predicting a major amputation in the same leg and to determine risk factors for major amputation in multiple minor amputations. MATERIALS AND METHODS A retrospective chart review including 429 patients with 534 index minor amputations between 07/1984 and 06/2019 was conducted. Patient demographics and clinical data including number and level of re-amputations were extracted from medical records and statistically analyzed. RESULTS 290 legs (54.3%) had one or multiple re-amputations after index minor amputation. 89 (16.7%) legs needed major amputation during follow up. Major amputation was performed at a mean of 32.5 (range 0 - 275.2) months after index minor amputation. No particular re-amputation demonstrated statistically significant elevated odds ratio (a.) to be a major amputation compared to the preceding amputation and (b.) to lead to a major amputation at any point during follow up. Stepwise multivariate Cox regression analysis revealed minor re-amputation within 90 days (HR 3.8, 95% CI 2.0-7.3, p <0.001) as the only risk factor for major amputation if at least one re-amputation had to be performed. CONCLUSIONS There is no distinct number of prior minor amputations in one leg that would justify a major amputation on its own. If a re-amputation has to be done, the timepoint needs to be considered as re-amputations within 90 days carry a fourfold risk for major amputation. LEVEL OF EVIDENCE Retrospective comparative study (Level III).
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Affiliation(s)
- Martin C Berli
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland
| | - Zoran Rancic
- Clinic for Vascular Surgery, University Hospital Zurich, and Medical Faculty, University of Zurich, Zurich, Switzerland
| | - Madlaina Schöni
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedic Surgery, University of Zurich, Institute for Biomechanics, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Pascal Schenk
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland
| | - Method Kabelitz
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland
| | - Thomas Böni
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland
| | - Felix W A Waibel
- Division of "Prosthetics and Orthotics", Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008, Zürich, Switzerland.
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11
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Furrer PR, Zimmermann SM, Böni T, Waibel FWA. Endoscopic Treatment of Stump Infection of the Residual Synovial Cavity After Through-the-Knee Amputation: A Case Report. JBJS Case Connect 2022; 12:01709767-202212000-00031. [PMID: 36574429 DOI: 10.2106/jbjs.cc.22.00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 09/23/2022] [Indexed: 12/28/2022]
Abstract
CASE We report the case of a 35-year-old patient who presented with a septic residual synovial cavity infection 8 weeks after a through-the-knee amputation because of a parosteal sarcoma. An endoscopic evacuation of the turbid fluid and synovial debridement through parapatellar portals as in a standard knee arthroscopy was performed, in conjunction with appropriate antibiotic therapy. One year postoperatively, there were no signs of residual infection. CONCLUSION Endoscopic treatment of a septic stump infection of the residual synovial cavity after through-the-knee amputation is feasible. In our case, this approach resulted in rapid wound healing and early prosthesis mobility.
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Affiliation(s)
- Pascal R Furrer
- Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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12
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Waibel FWA, Böni T. Nonoperative Treatment of Charcot Neuro-osteoarthropathy. Foot Ankle Clin 2022; 27:595-616. [PMID: 36096554 DOI: 10.1016/j.fcl.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Conservative treatment of Charcot neuro-osteoarthropathy (CN) aims to retain a stable, plantigrade, and ulcer-free foot, or to prevent progression of an already existing deformity. CN is treated with offloading in a total contact cast as long as CN activity is present. Transition to inactive CN is monitored by the resolution of clinical activity signs and by resolution of bony edema in MRI. Fitting of orthopedic depth insoles, orthopedic shoes, or ankle-foot orthosis should follow immediately after offloading has ended to prevent CN reactivation or ulcer development.
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Affiliation(s)
- Felix W A Waibel
- Division of Technical and Neuroorthopaedics, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, Zürich 8008, Switzerland.
| | - Thomas Böni
- Division of Technical and Neuroorthopaedics, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, Zürich 8008, Switzerland
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13
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Moret CS, Schöni M, Waibel FWA, Winkler E, Grest A, Liechti BS, Burkhard J, Holy D, Berli MC, Lipsky BA, Uçkay I. Correction of hyperglycemia after surgery for diabetic foot infection and its association with clinical outcomes. BMC Res Notes 2022; 15:264. [PMID: 35897027 PMCID: PMC9327423 DOI: 10.1186/s13104-022-06150-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
Objective Constantly high glycemia levels might influence outcomes in the management of patients undergoing surgery for diabetic foot infections (DFI). In our center for DFI, we performed a case–control study using a multivariate Cox regression model. Patients developing a new DFI could participate in the study several times. Results Among 1013 different DFI episodes in 586 individual adult patients (type I diabetes 148 episodes [15%], 882 [87%] with osteomyelitis; median antibiotic therapy of 21 days), professional diabetes counselling was provided by a specialized diabetes nurse in 195 episodes (19%). At admission, blood glucose levels were elevated in 110 episodes (11%). Treatments normalized glycemia on postoperative day 3 in 353 episodes (35%) and on day 7 for 321 (32%) episodes. Glycemia levels entirely normalized for 367 episodes (36%) until the end of hospitalization. Overall, treatment of DFI episodes failed in 255 of 1013 cases (25%), requiring surgical revision. By multivariate analysis, neither the provision of diabetes counseling, nor attaining normalizations of daily glycemic levels at day 3, day 7, or overall, influenced the ultimate incidence of clinical failures. Thus, the rapidity or success of achieving normoglycemia do not appear to influence the risk of treatment failure for operated DFI episodes.
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Affiliation(s)
- Céline S Moret
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Madlaina Schöni
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Felix W A Waibel
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Elin Winkler
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Angelina Grest
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Bettina S Liechti
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Jan Burkhard
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Dominique Holy
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Martin C Berli
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | | | - Ilker Uçkay
- Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland.
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14
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Abstract
BACKGROUND Diabetic foot osteomyelitis (DFO) often leads to amputations in the lower extremity. Data on the influence of the initial anatomical DFO localization on ultimate major amputation are limited. METHODS In this retrospective analysis, 583 amputation episodes in 344 patients (78 females, 266 males) were analyzed. All received a form of amputation in combination with antibiotic therapy. A multivariate logistic regression analysis with the primary outcome "major amputation" defined as an amputation above the ankle joint was performed. The association of risk factors including location of DFO, coronary artery disease, peripheral artery disease, neuropathy, nephropathy, and Charcot neuro-osteoarthropathy was analyzed. RESULTS Among 583 episodes, DFO was located in the forefoot in 512 (87.8%), in the midfoot in 43 (7.4%), and in the hindfoot in 28 episodes (4.8%). Overall, 53 of 63 (84.1%) major amputations were performed because of DFO in the setting of peripheral artery disease as primary indication. Overall, limb loss occurred in 6.1% (31/512) of forefoot, 20.9% (9/43) of midfoot, and 46.4% (13/28) of hindfoot DFO. Among these, 22 (41.5%) were performed as the primary treatment, whereas 31 (58.5%) followed previously failed minor amputations. Among this latter group of secondary major amputations, the DFO was localized to the forefoot in 23 of 583 (3.9%), the midfoot in 4 of 583 (0.7%) and the hindfoot in 4 of 583 (0.7%). In multivariate logistic regression analysis, initial hindfoot localization was a significant factor (P < .05), whereas peripheral artery disease, smoking, and a midfoot DFO were not found to be risk factors. CONCLUSION In our retrospective series, the frequency of limb loss in DFO increased with more proximal initial foot DFO lesions, with almost half of patients losing their limbs with a hindfoot DFO. LEVEL OF EVIDENCE Level IV, retrospective cohort study.
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Affiliation(s)
- Elin Winkler
- Department of Orthopedics, Balgrist
University Hospital, University of Zurich, Zurich, Switzerland,Elin Winkler, MD, Department of
Orthopedics, Balgrist University Hospital, Forchstrasse 340, Zürich, 8008,
Switzerland.
| | - Madlaina Schöni
- Department of Orthopedics, Balgrist
University Hospital, University of Zurich, Zurich, Switzerland
| | - Nicola Krähenbühl
- Department of Orthopedics, Balgrist
University Hospital, University of Zurich, Zurich, Switzerland
| | - Ilker Uçkay
- Infectiology, Unit for Clinical and
Applied Research and Infectiology, Balgrist University Hospital, Zurich,
Switzerland
| | - Felix W. A. Waibel
- Department of Orthopedics, Balgrist
University Hospital, University of Zurich, Zurich, Switzerland
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15
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Haug F, Waibel FWA, Lisy M, Winkler E, Uçkay I, Schöni M. The impact of the length of total and intravenous systemic antibiotic therapy for the remission of diabetic foot infections. Int J Infect Dis 2022; 120:179-186. [PMID: 35358726 DOI: 10.1016/j.ijid.2022.03.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/18/2022] [Accepted: 03/23/2022] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE We investigated the impact of the total length of systemic antibiotic therapy (ABT) and its initial intravenous (IV) part on clinical failure (CF) and microbiological failure (MF) in diabetic foot infections (DFIs). METHODS In this single-center, retrospective, unmatched case-control study, we included DFI episodes treated with a combined surgical-antibiotic approach. RESULTS We included 721 DFI episodes, 537 with osteomyelitis (DFO). CF occurred in 191 (26.5%) and MF in 42 (5.8%) episodes. Multivariate Cox regression analysis showed that a short ABT of 8-21 days (hazard ratio [HR] 0.4; 95% CI 0.2-0.7) was inversely associated with CF. This was also applicable for IV ABT with relatively short durations of 2-7 days (HR 0.5; 95% CI 0.3-0.8) or 8-14 days (HR 0.6; 95% CI 0.4-0.9). We failed to detect a minimal threshold of total or IV ABT predictive for CF or MF. CONCLUSIONS Compared with total ABT of more than 84 days and IV therapy of more than 14 days, shorter total and IV ABT yielded no enhanced risk of CF or MF. Considering the "bias by indication" that is inherent to retrospective DFI studies, the best study design concerning the duration of ABT would be a stratified, prospective randomized trial, which is currently under way in our medical center.
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Affiliation(s)
- Florian Haug
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland.
| | - Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Marcus Lisy
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Elin Winkler
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
| | - Ilker Uçkay
- Unit for Clinical and Applied Research, Balgrist University Hospital, University of Zurich, Switzerland; Infectiology, Balgrist University Hospital, University of Zurich, Switzerland
| | - Madlaina Schöni
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland
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16
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Uçkay I, Schöni M, Berli MC, Niggli F, Noschajew E, Lipsky BA, Waibel FWA. The association of chronic, enhanced immunosuppression with outcomes of diabetic foot infections. Endocrinol Diabetes Metab 2022; 5:e00298. [PMID: 34609066 PMCID: PMC8754246 DOI: 10.1002/edm2.298] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/29/2021] [Indexed: 12/18/2022] Open
Abstract
We investigated if a chronic, enhanced immunosuppressed condition, beyond the immunodeficiency related to diabetes, is associated with clinical failures after combined surgical and medical treatment for diabetic foot infection (DFI). This is a case-control cohort study in a tertiary centre for diabetic foot problems, using case-mix adjustments with multivariate Cox regression models. Among 1013 DFI episodes in 586 patients (median age 67 years; 882 with osteomyelitis), we identified a chronic, enhanced immune-suppression condition in 388 (38%) cases: dialysis (85), solid organ transplantation (25), immune-suppressive medication (70), cirrhosis (9), cancer chemotherapy (15) and alcohol abuse (243). Overall, 255 treatment episodes failed (25%). By multivariate analysis, the presence (as compared with absence) of chronic, enhanced immune-suppression was associated with a higher rate of clinical failures in DFI cases (hazard ratio 1.5, 95% confidence interval 1.1-2.0). We conclude that a chronic, enhanced immune-suppressed state might be an independent risk factor for treatment failure in DFI. Validation of this hypothesis could be useful information for both affected patients and their treating clinicians.
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Affiliation(s)
- Ilker Uçkay
- Infectiology, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Internal Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Madlaina Schöni
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Martin C Berli
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Fabian Niggli
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Internal Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Emil Noschajew
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | | | - Felix W A Waibel
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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17
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Uçkay I, Yogarasa V, Waibel FWA, Seiler-Bänziger A, Kuhn M, Sahli M, Berli MC, Lipsky BA, Schöni M. Nutritional Interventions May Improve Outcomes of Patients Operated on for Diabetic Foot Infections: A Single-Center Case-Control Study. J Diabetes Res 2022; 2022:9546144. [PMID: 36034588 PMCID: PMC9410992 DOI: 10.1155/2022/9546144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 07/30/2022] [Indexed: 11/18/2022] Open
Abstract
AIM While a patient's nutritional status is known to generally have a role in postoperative wound healing, there is little information on its role as therapy in the multifaceted problem of diabetic foot infections (DFIs). METHODS We assessed this issue by conducting a retrospective case-control cohort study using a multivariate Cox regression model. The nutrition status of the DFI patients was assessed by professional nutritionists, who also orchestrated the nutritional intervention (counselling, composition of the intrahospital food) during hospitalization. RESULTS Among 1,013 DFI episodes in 586 patients (median age 67 years; 882 with osteomyelitis), 191 (19%) received a professional assessment of their nutrition accompanied by between 1 and 6 nutritional interventions. DFI cases who had professional nutritionists' interventions had a significantly shorter hospital stay, had shorter antibiotic therapies, and tended to fewer surgical debridements. By multivariate analysis, episodes with low Nutritional Risk Status- (NRS-) Scores 1-3 were associated with significantly lower failure rates after therapy for DFI (Cox regression analysis; hazard ratio 0.2, 95% confidence interval 0.1-0.7). CONCLUSIONS In this retrospective cohort study, DFI episodes with low NRS-Score were associated with lower rates of clinical failure after DFI treatment, while nutritional interventions improved the outcome of DFI. We need prospective interventional trials for this treatment, and these are underway.
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Affiliation(s)
- Ilker Uçkay
- Infectiology, Balgrist University Hospital, University of Zurich, Switzerland
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Switzerland
| | - Vinoth Yogarasa
- Infectiology, Balgrist University Hospital, University of Zurich, Switzerland
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Switzerland
| | - Felix W. A. Waibel
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Switzerland
| | | | - Maja Kuhn
- Nutritionist Service, Balgrist University Hospital, University of Zurich, Switzerland
| | - Margrit Sahli
- Nutritionist Service, Balgrist University Hospital, University of Zurich, Switzerland
| | - Martin C. Berli
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Switzerland
| | | | - Madlaina Schöni
- Diabetic Foot Unit, Department of Orthopedic Surgery, Balgrist University Hospital, University of Zurich, Switzerland
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18
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Gratwohl V, Jentzsch T, Schöni M, Kaiser D, Berli MC, Böni T, Waibel FWA. Long-term follow-up of conservative treatment of Charcot feet. Arch Orthop Trauma Surg 2022; 142:2553-2566. [PMID: 33829302 PMCID: PMC9474498 DOI: 10.1007/s00402-021-03881-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 03/24/2021] [Indexed: 01/01/2023]
Abstract
BACKGROUND Charcot arthropathy (CN) can ultimately lead to limb loss despite appropriate treatment. Initial conservative treatment is the accepted treatment in case of a plantigrade foot. The aim of this retrospective study was to investigate the mid- to long-term clinical course of CN initially being treated conservatively, and to identify risk factors for reactivation and contralateral development of CN as well as common complications in CN. METHODS A total of 184 Charcot feet in 159 patients (median age 60.0 (interquartile range (IQR) 15.5) years, 49 (30.1%) women) were retrospectively analyzed by patient chart review. Rates of limb salvage, reactivation, contralateral development and common complications were recorded. Statistical analysis was performed to identify possible risk factors for limb loss, CN reactivation, contralateral CN development, and ulcer development. RESULTS Major amputation-free survival could be achieved in 92.9% feet after a median follow-up of 5.2 (IQR 4.25, range 2.2-11.25) years. CN recurrence occurred in 13.6%. 32.1% had bilateral CN involvement. Ulcers were present in 72.3%. 88.1% patients were ambulating in orthopaedic footwear without any further aids. Presence of Diabetes mellitus was associated with reactivation of CN, major amputation and ulcer recurrence. Smoking was associated with ulcer development and necessity of amputations. CONCLUSIONS With consistent conservative treatment of CN with orthopaedic footwear or orthoses, limb preservation can be achieved in 92.9% after a median follow-up of 5.2 years. Patients with diabetic CN are at an increased risk of developing complications and CN reactivation. To prevent ulcers and amputations, every effort should be made to make patients stop smoking. LEVEL OF EVIDENCE III, long-term retrospective cohort study.
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Affiliation(s)
- Viviane Gratwohl
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Thorsten Jentzsch
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Madlaina Schöni
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Dominik Kaiser
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Martin C. Berli
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Thomas Böni
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
| | - Felix W. A. Waibel
- grid.412373.00000 0004 0518 9682Divisions of “Prosthetics and Orthotics” and “Foot and Ankle Surgery”, Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zürich, Switzerland
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19
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Hartmann R, Grubhofer F, Waibel FWA, Götschi T, Viehöfer AF, Wirth SH. Treatment of hindfoot and ankle infections with Ilizarov external fixator or spacer, followed by secondary arthrodesis. J Orthop Res 2021; 39:2151-2158. [PMID: 33280159 DOI: 10.1002/jor.24938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 11/27/2020] [Accepted: 12/01/2020] [Indexed: 02/04/2023]
Abstract
An established treatment strategy in surgical site infection after hindfoot and ankle surgery is a two-stage procedure with debridement and placement of a cement spacer, followed by antibiotic treatment and secondary arthrodesis. However, there is little evidence to favor this treatment over a one-stage procedure with debridement, followed by primary arthrodesis with an Ilizarov external fixator and antibiotic treatment. We compared the infection control and clinical and radiological outcome of a two-stage and a one-stage procedure. In this study, 7 patients with a two-stage revision and 11 patients with a one-stage revision between 2005 and 2015 were included. The primary outcome was infection control (absence of the Musculoskeletal Infection Society PJI criteria) 2 years after the ankle or hindfoot arthrodesis. Secondary outcome measures were the AOFAS hindfoot score and radiological consolidation rate. Infection control was 85% (6 out of 7 patients) in the two-stage group and 81% (9 out of 11 patients) in the one-stage group (p = 1.0). One patient (14%) of the two-stage and two patients (18%) in the one-stage group needed below-knee amputation. In the two-stage group, the mean postoperative AOFAS score was 74.8 (SD: ±11.3) versus 71.7 (SD: ±17.8) in the one-stage group. Radiological consolidation could be achieved in 71% in the spacer group (n = 5) and in 72% in the Ilizarov external fixator group (n = 9). Infection control, AOFAS score, and radiologic consolidation of hindfoot and ankle arthrodesis were comparable in both groups of patients with complicated postsurgical hindfoot or ankle infections.
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Affiliation(s)
- Rebecca Hartmann
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Florian Grubhofer
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedic Surgery, Institute for Biomechanics, ETH Zurich, Balgrist Campus, University of Zurich, Zurich, Switzerland
| | - Arnd F Viehöfer
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Stephan H Wirth
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
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Kaiser D, Trummler L, Götschi T, Waibel FWA, Snedeker JG, Fucentese SF. The quantitative influence of current treatment options on patellofemoral stability in patients with trochlear dysplasia and symptomatic patellofemoral instability - a finite element simulation. Clin Biomech (Bristol, Avon) 2021; 84:105340. [PMID: 33836490 DOI: 10.1016/j.clinbiomech.2021.105340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/19/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Trochlear dysplasia is highly associated with patellofemoral instability. The goal of conservative and surgical treatment is to stabilize the patella while minimizing adverse effects. However, there is no literature investigating the quantitative influence of different treatment options on patellofemoral stability in knees with trochlear dysplasia. We created and exploited a range of finite element models to address this gap in knowledge. METHODS MRI data of 5 knees with trochlear dysplasia and symptomatic patellofemoral instability were adapted into this previously established model. Vastus medialis obliquus strengthening as well as double-bundle medial patellofemoral ligament reconstruction and the combination of medial patellofemoral ligament reconstruction and trochleoplasty were simulated. The force necessary to dislocate the patella by 10 mm and fully dislocate the patella was calculated in different flexion angles. FINDINGS Our model predicts a significant increase of patellofemoral stability at the investigated flexion angles (0°-45°) for a dislocation of 10 mm and a full dislocation after medial patellofemoral ligament reconstruction and the combination of medial patellofemoral ligament reconstruction and trochleoplasty compared to trochleodysplastic (P = 0.01) and healthy knees (P = 0.01-0.02). Vastus medialis obliquus strengthening has a negligible effect on patellofemoral stability. INTERPRETATIONS This is the first objective quantitative biomechanical evidence supporting the place of medial patellofemoral ligament reconstruction and medial patellofemoral ligament reconstruction combined with trochleoplasty in patients with symptomatic patellofemoral instability and trochlear dysplasia type B. Vastus medialis obliquus strengthening has a negligible effect on patellar stability at a low total quadriceps load of 175 N.
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Affiliation(s)
- Dominik Kaiser
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.
| | - Linus Trummler
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Jess G Snedeker
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Sandro F Fucentese
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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Schöni M, Waibel FWA, Bauer D, Götschi T, Böni T, Berli MC. Long-term results after internal partial forefoot amputation (resection): a retrospective analysis. Arch Orthop Trauma Surg 2021; 141:543-554. [PMID: 32266517 DOI: 10.1007/s00402-020-03441-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Internal partial forefoot amputation (IPFA) is a treatment option for osteomyelitis and refractory and recurrent chronic ulcers of the forefoot. The aim of our study was to assess the healing rate of chronic ulcers, risk of ulcer recurrence at the same area or re-ulceration at a different area and revision rate in patients treated with IPFA. MATERIALS AND METHODS All patients who underwent IPFA of a phalanx and/or metatarsal head and/or sesamoids at our institution because of chronic ulceration of the forefoot and/or osteomyelitis from 2004 to 2014 were included. Information about patient characteristics, ulcer healing, new ulcer occurrence, and revision surgery were collected. Kaplan-Meier survival curves were plotted for new ulcer occurrence and revision surgery. RESULTS A total of 102 patients were included (108 operated feet). 55.6% of our patients had diabetes. In 44 cases, an IPFA of a phalanx was performed, in 60 cases a metatarsal head resection and in 4 cases an isolated resection of sesamoids. The mean follow-up was 40.9 months. 91.2% of ulcers healed after a mean period of 1.3 months. In 56 feet (51.9%), a new ulcer occurred: 11 feet (10.2%) had an ulcer in the same area as initially (= ulcer recurrence), in 45 feet (41.7%) the ulcer was localized elsewhere (= re-ulceration). Revision surgery was necessary in 39 feet (36.1%). Only one major amputation and five complete transmetatarsal forefoot amputations were necessary during the follow-up period. Thus, the major amputation rate was 0.9%, and the minor amputation rate on the same ray was 13.9%. CONCLUSIONS IPFA is a valuable treatment of chronic ulcers of the forefoot. However, new ulceration is a frequent event following this type of surgery. Our results are consistent with the reported re-ulceration rate after conservative treatment of diabetic foot ulcers. The number of major amputations is low after IPFA. LEVEL OF EVIDENCE Retrospective Case Series Study (Level IV).
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Affiliation(s)
- Madlaina Schöni
- Division of Technical Orthopedics, Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland.
| | - Felix W A Waibel
- Division of Technical Orthopedics, Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - David Bauer
- Division of Technical Orthopedics, Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopedic Surgery, Institute for Biomechanics, University of Zurich, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Thomas Böni
- Division of Technical Orthopedics, Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Martin C Berli
- Division of Technical Orthopedics, Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
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Uçkay I, Holy D, Schöni M, Waibel FWA, Trache T, Burkhard J, Böni T, Lipsky BA, Berli MC. How good are clinicians in predicting the presence of Pseudomonas spp. in diabetic foot infections? A prospective clinical evaluation. Endocrinol Diabetes Metab 2021; 4:e00225. [PMID: 33855224 PMCID: PMC8029573 DOI: 10.1002/edm2.225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/22/2020] [Accepted: 12/26/2020] [Indexed: 12/17/2022] Open
Abstract
Introduction The most frequently prescribed empirical antibiotic agents for mild and moderate diabetic foot infections (DFIs) are amino-penicillins and second-generation cephalosporins that do not cover Pseudomonas spp. Many clinicians believe they can predict the involvement of Pseudomonas in a DFI by visual and/or olfactory clues, but no data support this assertion. Methods In this prospective observational study, we separately asked 13 experienced (median 11 years) healthcare workers whether they thought the Pseudomonas spp. would be implicated in the DFI. Their predictions were compared with the results of cultures of deep/intraoperative specimens and/or the clinical remission of DFI achieved with antibiotic agents that did not cover Pseudomonas. Results Among 221 DFI episodes in 88 individual patients, intraoperative tissue cultures grew Pseudomonas in 22 cases (10%, including six bone samples). The presence of Pseudomonas was correctly predicted with a sensitivity of 0.32, specificity of 0.84, positive predictive value of 0.18 and negative predictive value 0.92. Despite two feedbacks of the interim results and a 2-year period, the clinicians' predictive performance did not improve. Conclusion The combined visual and olfactory performance of experienced clinicians in predicting the presence of Pseudomonas in a DFI was moderate, with better specificity than sensitivity, and did not improve over time. Further investigations are needed to determine whether clinicians should use a negative prediction of the presence of Pseudomonas in a DFI, especially in settings with a high prevalence of pseudomonal DFIs.
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Affiliation(s)
- Ilker Uçkay
- InfectiologyBalgrist University HospitalZurichSwitzerland
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
| | - Dominique Holy
- Internal MedicineBalgrist University HospitalZurichSwitzerland
| | - Madlaina Schöni
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
| | - Felix W. A. Waibel
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
| | - Tudor Trache
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
| | - Jan Burkhard
- Internal MedicineBalgrist University HospitalZurichSwitzerland
| | - Thomas Böni
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
| | | | - Martin C. Berli
- Department of Orthopedic SurgeryBalgrist University HospitalZurichSwitzerland
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Waibel FWA, Berndt K, Jentzsch T, Farei-Campagna J, Rahm S, Dora C, Zingg PO. Symptomatic leg length discrepancy after total hip arthroplasty is associated with new onset of lower back pain. Orthop Traumatol Surg Res 2021; 107:102761. [PMID: 33316448 DOI: 10.1016/j.otsr.2020.102761] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 08/31/2020] [Accepted: 09/24/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Leg length discrepancy (LLD) is common after total hip arthroplasty (THA) with a plethora of clinical consequences. The associations between symptomatic (sLLD; disturbing perception of anatomical leg length discrepancy), anatomical (aLLD; side difference in leg length between the center of rotation of the hip and the center of the ankle joint) and intraarticular (iLLD; side difference between the tear drop figure and the most prominent point of the trochanter minor) LLD and lower back have not yet been reported in the literature. We performed a retrospective study to answer if postoperative (1) symptomatic LLD, (2) anatomic LLD, and (3) a change in intraarticular leg length are associated with lower back pain in patients undergoing THA. Further, we aimed to answer (4) whether symptomatic LLD is associated with the magnitude of anatomical LLD and the change in intraarticular leg length. HYPOTHESIS LLD after THA is associated with lower back pain. MATERIALS AND METHODS Seventy-nine consecutive patients were retrospectively analyzed for the presence of aLLD and iLLD using EOS™ and X-rays, and were interviewed for the presence of sLLD and lower back pain using a questionnaire 5 years after primary THA. RESULTS Postoperative new onset of lower back pain was reported by 9 (11%) patients. Twenty (25%) patients reported sLLD. Anatomical LLD>5mm was present in 44 (56%) (median 8.0 (IQR -3.0 to 12.0; range -22 to 22) mm) and>10mm in 17 (22%) (median 12.0 (IQR 11.0 to 16.5; range -22 to 22) mm) patients. iLLD changed>5mm in 44 (56%) (median 8.5 (IQR 7.0 to 10.0; range -8 to 18) mm) and>10mm in 10 (13%) (median 14.0 (IQR 12.5 to 14.5; range 11 to 18) mm). New onset lower back pain was associated with sLLD (p=0.002) but not with aLLD or iLLD. Patients without preoperative lower back pain had a statistically significant association between presence of sLLD and an aLLD of >10mm (p=0.01). CONCLUSIONS Symptomatic LLD after primary THA is associated with postoperative new onset of lower back pain irrespective of the magnitude of LLD. In patients without lower back pain prior to THA, symptomatic LLD is associated with anatomical LLD of more than 10mm. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland.
| | - Kersten Berndt
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Thorsten Jentzsch
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Jan Farei-Campagna
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Stefan Rahm
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Claudio Dora
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Patrick O Zingg
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
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Kaiser D, Trummler L, Götschi T, Waibel FWA, Snedeker JG, Fucentese SF. Patellofemoral instability in trochleodysplastic knee joints and the quantitative influence of simulated trochleoplasty - A finite element simulation. Clin Biomech (Bristol, Avon) 2021; 81:105216. [PMID: 33223216 DOI: 10.1016/j.clinbiomech.2020.105216] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 10/09/2020] [Accepted: 11/04/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Patellofemoral instability is a debilitating condition mainly affecting young patients and has been correlated with trochlear dysplasia. It can occur when the patella is insufficiently guided through its range of motion. Currently, there is no literature describing patellofemoral stability in trochleodysplastic knees and the effect of isolated trochleoplasty on patellofemoral stability. METHODS The effect of isolated trochleoplasty in trochleodysplastic knees of patients with symptomatic patellofemoral instability was investigated using a quasi-static finite element model. MRI data of five healthy knees were segmented, meshed and a finite element analysis was performed in order to validate the model. A second validation was performed by comparing simulated patellofemoral kinematics to in-vivo values obtained from upright- weight bearing CT scans. Subsequently, five trochleodysplastic knees were modelled before and after simulated trochleoplasty. The force necessary to dislocate the patella by 10 mm and to fully dislocate the patella was calculated in various knee flexion angles between 0 and 45°. FINDINGS The developed models successfully predicted outcome values within the range of reference values from literature. Lateral stability was significantly lower in trochleodysplastic knees compared to healthy knees. Trochleoplasty was determined to significantly increase the force necessary to dislocate the patella in trochleodysplastic knees to comparable values as in healthy knees. INTERPRETATION This is the first study to investigate lateral patellofemoral stability in patients with symptomatic patellofemoral instability and dysplasia of the trochlear groove. We confirm that patellofemoral stability is significantly lower in trochleodysplastic knees than in healthy knees. Trochleoplasty increases patellofemoral stability to levels similar to healthy.
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Affiliation(s)
- Dominik Kaiser
- Department of Orthopedics, Balgrist University Hospital, Zurich, Switzerland.
| | - Linus Trummler
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopedics, Balgrist University Hospital, Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopedics, Balgrist University Hospital, Zurich, Switzerland
| | - Jess G Snedeker
- Department of Orthopedics, Balgrist University Hospital, Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Sandro F Fucentese
- Department of Orthopedics, Balgrist University Hospital, Zurich, Switzerland
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Wirth SH, Viehöfer AF, Tondelli T, Hartmann R, Berli MC, Böni T, Waibel FWA. Mid-term walking ability after Charcot foot reconstruction using the Ilizarov ring fixator. Arch Orthop Trauma Surg 2020; 140:1909-1917. [PMID: 32170454 DOI: 10.1007/s00402-020-03407-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Indexed: 01/13/2023]
Abstract
BACKGROUND Failed conservative treatment and complications are indications for foot reconstruction in Charcot arthropathy. External fixation using the Ilizarov principles offers a one-stage procedure for deformity correction and resection of osteomyelitic bone. The aim of this study was to determine whether external fixation with an Ilizarov ring fixator leads reliably to walking ability. MATERIALS AND METHODS 29 patients treated with an Ilizarov ring fixator for Charcot arthropathy were retrospectively analyzed. Radiologic fusion at final follow up was assessed separately on conventional X-rays by two authors. The association between walking ability and the presence of osteomyelitis at the time of reconstruction, and the presence of fusion at final follow up was investigated using Fisher's exact test. RESULTS Mean follow up was 35 months (range 5.3-107) months; mean time of external fixation was 113 days. Ten patients (34.5%) reached fusion, but 19 did not (65.5%). Two patients needed below knee amputation. 26 of the remaining 27 patients maintained walking ability, 23 of those without assistive devices. Walking ability was independent from the presence of osteomyelitis at the time of reconstruction and from the presence of fusion. CONCLUSION Foot reconstruction with an Ilizarov ring fixator led to limb salvage in 93%. The vast majority (96.3%) of patients with successful limb salvage was ambulatory, independent from radiologic fusion, and presence of osteomyelitis at the time of reconstruction. These findings encourage limb salvage and deformity correction in this difficult-to-treat disease, even with underlying osteomyelitis.
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Affiliation(s)
- Stephan H Wirth
- Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Arnd F Viehöfer
- Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Timo Tondelli
- Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Rebecca Hartmann
- Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Martin C Berli
- Divison of Technical Orthopaedics, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Thomas Böni
- Divison of Technical Orthopaedics, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Felix W A Waibel
- Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland. .,Divison of Technical Orthopaedics, Department of Orthopaedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland.
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Abstract
BACKGROUND The contralateral foot in Charcot arthropathy or neuroarthropathy (CN) is subject to increased plantar pressure. To date, the clinical consequences of this pressure elevation are yet to be determined. The aim of this study was to evaluate ulcer and amputation rates of the contralateral foot in CN. METHODS We abstracted the medical records of 130 consecutive subjects with unilateral CN. Rates of contralateral CN development and recurrence, contralateral ulcer development, and contralateral amputations were recorded. Statistical analysis was performed to identify possible risk factors for contralateral CN and ulcer development, and contralateral amputation. Mean follow-up was 6.2 (SD 4) years. RESULTS After a mean of 2.5 years, 19.2% patients developed contralateral CN. Female gender was associated with contralateral CN development (odds ratio 3.13, 95% confidence interval 1.27, 7.7). Overall, 46.2% patients developed a contralateral ulcer. Among the patients who developed contralateral CN, 60% developed an ulcer. Sanders type 2 at the index foot (midfoot CN) was significantly associated with contralateral ulcer development. Ulcer-free survival (UFS) differed significantly between patients with diabetes type 1 (median UFS 5131 days) and patients with diabetes type 2 (median UFS 2158 days). A total of 25 amputations had to be performed in 22 (16.9%) patients. Three of those 22 patients (2.3%) needed major amputation. CONCLUSION Almost 20% of patients developed contralateral CN. Nearly half of people with CN developed a contralateral foot ulceration. Patients with type 2 diabetes had significantly shorter UFS than patients with diabetes type 1. Every sixth patient needed an amputation, with the majority being minor amputations. The contralateral foot should be monitored closely and included in the treatment in patients with CN. LEVEL OF EVIDENCE Level IV, retrospective study.
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Affiliation(s)
- Felix W. A. Waibel
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Martin C. Berli
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Viviane Gratwohl
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Kati Sairanen
- Unit for Clinical and Applied Research, Balgrist University Hospital, Zurich, Switzerland
| | - Dominik Kaiser
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Laura Shin
- Department of Surgery, The Southwestern Academic Limb Salvage Alliance (SALSA), Keck School of Medicine of University of Southern California (USC), Los Angeles, CA, USA
| | - David G. Armstrong
- Department of Surgery, The Southwestern Academic Limb Salvage Alliance (SALSA), Keck School of Medicine of University of Southern California (USC), Los Angeles, CA, USA
| | - Madlaina Schöni
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
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Berli MC, Jundt-Ecker M, Meier MR, Hofer M, Schöni M, Götschi T, Uçkay I, Böni T, Waibel FWA. Resting TcPO2 levels decrease during liner wear in persons with a transtibial amputation. PLoS One 2020; 15:e0239930. [PMID: 32986780 PMCID: PMC7521692 DOI: 10.1371/journal.pone.0239930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 09/16/2020] [Indexed: 11/30/2022] Open
Abstract
Background In our clinic, a substantial number of patients present with transtibial residual limb pain of no specific somatic origin. Silicone liner induced tissue compression may reduce blood flow, possibly causing residual limb pain. Thus, as a first step we investigated if the liner itself has an effect on transcutaneous oxygen pressure (TcPO2). Methods Persons with unilateral transtibial amputation and residual limb pain of unknown origin were included. Medical history, including residual limb pain, was recorded, and the SF-36 administered. Resting TcPO2 levels were measured in the supine position and without a liner at 0, 10, 20 and 30 minutes using two sensors: one placed in the Transverse plane over the tip of the Tibia End (= TTE), the other placed in the Sagittal plane, distally over the Peroneal Compartment (= SPC). Measurements were repeated with specially prepared liners avoiding additional pressure due to sensor placement. Statistical analyses were performed using SPSS. Results Twenty persons (9 women, 11 men) with a mean age of 68.65 years (range 47–86 years) participated. The transtibial amputation occurred on average 43 months prior to study entry (range 3–119 months). With liner wear, both sensors measured TcPO2 levels that were significantly lower than those measured without a liner (TTE: p < 0.001; SPC: p = 0.002) after 10, 20 and 30 minutes. No significant differences were found between TcPO2 levels over time between the sensors. There were no significant associations between TcPO2 levels and pain, smoking status, age, duration of daily liner use, mobility level, and revision history. Conclusion Resting TcPO2 levels decreased significantly while wearing a liner alone, without a prosthetic socket. Further studies are required to investigate the effect of liner wear on exercise TcPO2 levels.
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Affiliation(s)
- Martin C. Berli
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Michèle Jundt-Ecker
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | | | | | - Madlaina Schöni
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedic Surgery, Institute for Biomechanics, University of Zurich, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Ilker Uçkay
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Thomas Böni
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Felix W. A. Waibel
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
- * E-mail:
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Häller TV, Kaiser P, Kaiser D, Berli MC, Uçkay I, Waibel FWA. Outcome of Ray Resection as Definitive Treatment in Forefoot Infection or Ischemia: A Cohort Study. J Foot Ankle Surg 2020; 59:27-30. [PMID: 31882144 DOI: 10.1053/j.jfas.2019.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/08/2019] [Accepted: 06/13/2019] [Indexed: 02/08/2023]
Abstract
Ray resection is frequently performed in cases of infection or ischemia, but the literature is scarce concerning its outcome as a definitive treatment. In this retrospective cohort study, we reviewed our cohort with transmetatarsal ray resection with a mean follow-up of 36.3 months. Reulcerations, transfer ulcers, and reamputations were determined. Risk factor analysis for revision surgery was conducted. Among 185 patients, 71 (38.4%) had revision surgery within a mean of 1.4 ± 2.6 years (range 2 days to 12.9 years), 22 (11.9%) had major amputations, 49 (26.5%) had minor amputations, 11 (5.9%) had same-ray reulceration, 40 (21.6%) had transfer ulceration, and 2 (1.1%) had both reulceration and transfer ulceration. Occurrence of a postoperative ulcer was statistically significantly associated with revision surgery (p < .01). In conclusion, metatarsal ray resection is a reasonable treatment option in cases of forefoot ischemia or infection to prevent major amputation but fails in 11.9%, and reulceration is associated with further revisions, making ulcer prevention paramount.
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Affiliation(s)
- Thomas V Häller
- Resident Orthopaedic Surgeon, Orthopedic Department, Balgrist University Hospital, Zurich, Switzerland.
| | - Peter Kaiser
- Resident Orthopaedic Surgeon, Orthopedic Department, Balgrist University Hospital, Zurich, Switzerland
| | - Dominik Kaiser
- Consultant Orthopaedic Surgeon, Orthopedic Department, Balgrist University Hospital, Zurich, Switzerland
| | - Martin C Berli
- Senior Consultant Orthopaedic Surgeon, Orthopedic Department, Balgrist University Hospital, Zurich, Switzerland
| | - Ilker Uçkay
- Senior Consultant Infectiologist, Unit for Clinical and Applied Research, Balgrist University Hospital, Zurich, Switzerland; Senior Consultant Infectiologist, Infectiology, Balgrist University Hospital, Zurich, Switzerland
| | - Felix W A Waibel
- Consultant Orthopaedic Surgeon, Orthopedic Department, Balgrist University Hospital, Zurich, Switzerland
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Andronic O, Boeni T, Burkhard MD, Kaiser D, Berli MC, Waibel FWA. Modifications of the pirogoff amputation technique in adults: A retrospective analysis of 123 cases. J Orthop 2020; 18:5-12. [PMID: 32189875 DOI: 10.1016/j.jor.2019.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 10/27/2019] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND The Pirogoff amputation (1854) was initially developed to provide full-weight-bearing stumps and therefore allow a short ambulation without prosthesis. Modifications of the original technique including Boyd (1939) and the "Modified Pirogoff" were developed, which further reduced complications and improved the outcome. However, the current evidence regarding the techniques is scarce. The functional outcome, survivorship and complication rates are unknown. It was the purpose of this study to expand the knowledge with a retrospective case series and ultimately summarize and analyze the data with a systematic review. METHODS A retrospective study of the Boyd procedures from our institution between 1999 and 2018 was performed. Outcome was determined based on the PLUS-M Score (Prosthetic Limb Users Survey of Mobility). Survivorship (absence of more proximal amputation), postoperative leg-length discrepancy, time to early fusion and time to mobilization were also evaluated. Finally, in the second part of the study, the results were integrated in a systematic review, which followed the Preferred Reporting Items of Systematic Reviews and Meta-analysis (PRISMA) guidelines. The quality of all the studies were then assessed using the Joanna Briggs Institute Critical Appraisal Checklist (JBI CAC). RESULTS A total of 123 procedures including 115 patients, with an average follow-up of 45 months (range, 10-300 months) could be included. A very good or good function could be achieved in 85 (69%) patients. The mean survivorship was 82.1% (range 46%-100%). In four studies, including our series, all patients remained with a functional stump at the latest follow-up. The calculated average leg-length discrepancy was 2.5 cm. CONCLUSION The "Modified Pirogoff" and Boyd amputation techniques can achieve favourable long-term functional outcome in cases of irreparable foot conditions such as osteomyelitis or trauma. Patency of the posterior tibial artery is an indispensable condition to elect for these surgical techniques. Presence of neuropathy does not preclude this amputation level. With proper patient selection, a maximal survivorship of the stump with treatable minor complications can be achieved.Level of Evidence: IV.
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Affiliation(s)
- Octavian Andronic
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Thomas Boeni
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Marco D Burkhard
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Dominik Kaiser
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Martin C Berli
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
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Gariani K, Waibel FWA, Viehöfer AF, Uçkay I. Plantar Fasciitis in Diabetic Foot Patients: Risk Factors, Pathophysiology, Diagnosis, and Management. Diabetes Metab Syndr Obes 2020; 13:1271-1279. [PMID: 32368120 PMCID: PMC7183784 DOI: 10.2147/dmso.s184259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 04/07/2020] [Indexed: 12/19/2022] Open
Abstract
Plantar fasciitis (PF) is a common degenerative disorder and a frequent cause of heel pain, mostly affecting patients in their fourth and fifth decades. Diabetic patients are particularly at risk due to the presence of common risks and co-morbidities such as obesity or a sedentary lifestyle. The diagnosis of PF is mainly clinical. Imaging is not recommended for the initial approach. The initial management is conservative and should include physiotherapy, off-loading, stretching exercises, and nonsteroidal anti-inflammatory drugs. Glucocorticoid injections or surgery is an option at a later stage in recalcitrant cases. The overall management of PF does not differ between patients with diabetic foot problems and non-diabetic patients, although the details can differ. This narrative review summarizes the state of the art in terms of the risk factors, pathophysiology, diagnosis, assessment, and management of PF in diabetic patients.
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Affiliation(s)
- Karim Gariani
- Service of Endocrinology, Diabetes, Hypertension and Nutrition, Geneva University Hospitals, Geneva, Switzerland
- Correspondence: Karim Gariani Endocrinology, Diabetes, Hypertension and Nutrition, Geneva University Hospitals, Geneva, Switzerland Email
| | - Felix W A Waibel
- Foot and Ankle Service, Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Arnd F Viehöfer
- Foot and Ankle Service, Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Ilker Uçkay
- Unit for Clinical and Applied Research, Balgrist University Hospital, Zurich, Switzerland
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Waibel FWA, Uçkay I, Sairanen K, Waibel L, Berli MC, Böni T, Gariani K, Lipsky BA. Diabetic calcaneal osteomyelitis. Infez Med 2019; 27:225-238. [PMID: 31545766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Diabetic foot infection (DFI), a multi-facetted disease requiring a multidisciplinary approach for successful treatment, mostly affects the forefoot. Calcaneal osteomyelitis (CO) is an uncommon presentation of DFI with a somewhat different epidemiology, clinical features, and approach to management. These patients, compared to those with non-calcaneal DFI, more often require special surgical techniques and off-loading approaches. In this narrative review targeted to non-surgical clinicians, we explore how CO differs from other types of DFI affecting other anatomical locations. Based on our review of the literature and personal experience, we also highlight important issues regarding the management of CO osteomyelitis, including the need for specialized surgical approaches.
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Affiliation(s)
- Felix W A Waibel
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Ilker Uçkay
- Unit for Clinical and Applied Research, Balgrist University Hospital, Zurich, Switzerland; Infectiology, Balgrist University Hospital, Zurich, Switzerland
| | - Kati Sairanen
- Unit for Clinical and Applied Research, Balgrist University Hospital, Zurich, Switzerland
| | - Lorenz Waibel
- Department of Radiology, University Hospital Freiburg, Germany
| | - Martin C Berli
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Thomas Böni
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Karim Gariani
- Service of Diabetology and Endocrinology, Geneva University Hospitals, Switzerland
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Berli MC, Wanivenhaus F, Kabelitz M, Götschi T, Böni T, Rancic Z, Waibel FWA. Predictors for reoperation after lower limb amputation in patients with peripheral arterial disease. VASA 2019; 48:419-424. [PMID: 31063045 DOI: 10.1024/0301-1526/a000796] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Background: Major amputations in patients with peripheral arterial disease (PAD) carry a high risk for complications, including revision of the amputation, sometimes to a higher level. Determining a safe level for amputation with good wound healing potential depends largely on vascular measurements. This study evaluated potential predictive factors for revision of major lower extremity amputations in patients with PAD. Patients and methods: A retrospective chart review of all major lower extremity amputations at our institution was conducted. Amputations due to trauma or tumor and below-ankle amputations were excluded. Patient demographics, level/type of amputation, level/time of revision, comorbidities and risk factors were extracted. Results: 180 patients with PAD, mean age 66.48 (range: 31-93) years, 125 (69.4%) male were included. Most (154/180, 86.6%) underwent below-knee amputation. 71 (39.4%) patients had coronary arterial disease, 104 (57.8%) had diabetes. More than half of patients, (93/138; 51.7%) had undergone previous balloon angioplasty. 44 (30%) patients required revision surgery: 42/180 (23.3%) were revised at the same level, and in 12/180 (6.7%) a more proximal amputation was necessary. PAD stage was not associated with the level of reamputation (p = 0.4369). Significantly more patients who had previous balloon angioplasty required revision surgery (66.7% versus 45.2%, p = 0.009). 67 (37.2%) patients underwent preoperative TcPO2 measurement: 40/67 (59.7%) had TcPO2 ≥ 40 mmHg; 4/67 (6%) had TcPO2 < 10 mmHG. Three patients with TcPO2 ≥ 40 mmHg, one with 30 mmHg ≤ TcPO2 ≤ 40 mmHg and one with 10 mmHg ≤ TcPO2 ≤ 20 mmHg required re-amputation to a more proximal level. Conclusions: TcPO2 measurements are useful for determining level of lower limb amputation and predicting wound healing problems when an amputation level with TcPO2 < 40 mmHg is chosen. In transtibial amputations, TcPO2 ≥ 40 mmHg does not safely predict wound healing.
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Affiliation(s)
- Martin C Berli
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Florian Wanivenhaus
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Method Kabelitz
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Tobias Götschi
- Department of Orthopaedic Surgery, University of Zurich, Institute for Biomechanics, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Thomas Böni
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Zoran Rancic
- Division of Vascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Felix W A Waibel
- Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
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Abstract
BACKGROUND Surgical procedures for calcaneal osteomyelitis are partial calcanectomy (PC), total calcanectomy (TC), and below-knee amputation (BKA). With calcaneal osteomyelitis, limb-saving surgery was described to have secondary BKA rates of 4% to 20%, while secondary amputation rates after BKA are unknown. The aim of this study was to describe and compare overall revision and secondary amputation rates for each surgical option in our institution's cohort and to identify risk factors for secondary amputation. METHODS Fifty patients treated between 2002 and 2017 were included. Revisions, secondary amputations, and possible risk factors for secondary amputation and overall revision were statistically analyzed. RESULTS Minor revisions rates were 57.1% in PCs, 100% in TCs, and 27.8% in BKAs. Secondary amputation was performed in 28.6% of the PCs, in 50% of the TCs, and in 5.6% of the BKAs. No statistically significant differences between overall revision and secondary amputation rates were found. C-reactive protein values greater than 5 mg/L at the index procedure were significantly associated with overall revision while we could not identify risk factors for secondary amputation. CONCLUSION This study represents the largest group of patients treated for calcaneal osteomyelitis in the literature. In limb-preserving surgical options, secondary BKA rates are higher than previously known. Primary BKA is a procedure with a low reamputation rate of 5.6%. PC can be considered, with 28.6% needing more proximal amputation. In TC, all patients underwent revision surgery and 50% had to undergo secondary BKA. Therefore, we hesitate to consider total calcanectomy as a surgical option in calcaneal osteomyelitis anymore. LEVEL OF EVIDENCE Level IV, case series.
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Affiliation(s)
- Felix W A Waibel
- 1 Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Alexander Klammer
- 1 Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Tobias Götschi
- 2 Department of Orthopaedic Surgery, University of Zurich, Institute for Biomechanics, ETH Zurich, Balgrist Campus, Zurich, Switzerland
| | - Ilker Uçkay
- 3 Unit for Clinical and Applied Research and Infectiology, Balgrist University Hospital, Zurich, Switzerland
| | - Thomas Böni
- 1 Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
| | - Martin C Berli
- 1 Department of Orthopaedic Surgery, Balgrist University Hospital, Zurich, Switzerland
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