Karl Schwaiger

Dr. Karl Schwaiger

Department of Plastic, Reconstructive and Aesthetic Surgery, Hospital of St. John of God Salzburg, Paracelsus Medical University Salzburg
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Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 May 2015 in Aesthetic Plastic Surgery
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LLLorenz Larcher
Lorenz Larcher
Karl SchwaigerKarl Schwaiger
Karl Schwaiger
Klaus EisendleKlaus Eisendle
Klaus Eisendle
FEFlorian Ensat
Florian Ensat
KHKlemens Heinrich
Klemens Heinrich
GWGottfried Wechselberger
Gottfried Wechselberger

1 August 2018 in Medicine
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Journal Article
Open access
Karl SchwaigerKarl Schwaiger
Karl Schwaiger
PPPaul Panzenbeck
Paul Panzenbeck
MPMartin Purschke
Martin Purschke
ERElisabeth Russe
Elisabeth Russe
RKRené Kaplan
René Kaplan
GWGottfried Wechselberger
Gottfried Wechselberger
Meralgia paresthetica (MP) is a rare lateral femoral cutaneous nerve-(LFCN)-mononeuropathy. Treatment for this disorder includes conservative and operative approaches; the latter is considered if conservative therapy fails. The most commonly used surgical approaches are decompression/neurolysis and avulsion/neurectomy. However, there are no definitive guidelines on the optimal surgical approach to be used. The purpose of this study was to evaluate the outcome of surgical decompression of the LFCN for the treatment of persistent MP with preservation of sensation along the distribution of the LFCN. We evaluated the outcomes of LFCN procedures performed between 2015 and 2016. A total of 16 surgical decompressions could be identified. Retrospective analysis of prospectively collected patient data was performed, as well as systematic evaluation of the postoperative course, with regular follow-up examinations based on a standardized protocol. Pain was analyzed using an NRS (numeric rating scale). Several postsurgical parameters, including temperature hypersensitivity and numbness in the LFCN region, were compared with the presurgical data. Sixty-nine percent of patients had histories of trauma or surgery, which were designated as the onset of pain. Of these patients, 78% had hip prostheses, 2 had previous falls. Postoperatively, a significant reduction of 6.6 points in the mean NRS pain value was observed. All other evaluated parameters also improved postoperatively. Patient satisfaction was high, with 86% reporting complete satisfaction, and 14% reporting partial satisfaction. Previous studies favor either avulsion/neurectomy as the preferred procedure for MP treatment, or provide no recommendation. Our findings instead confirm the decompression/neurolysis approach as the primary surgical procedure of choice for the treatment of MP, if conservative treatment fails.

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LWLaurenz Weitgasser
Laurenz Weitgasser
Karl SchwaigerKarl Schwaiger
Karl Schwaiger
FMFabian Medved
Fabian Medved
FHFelix Hamler
Felix Hamler
Gottfried WechselbergerGottfried Wechselberger
Gottfried Wechselberger
TSThomas Schoeller
Thomas Schoeller
Background: A two center retrospective cohort study of simultaneous bilateral breast reconstructions using double deep inferior epigastric perforator (DIEP) flaps and double transverse myocutaneous/upper gracilis (TMG) flaps was conducted. The aim of this study was to compare surgical procedures, complications, and overall outcome. Patients and Methods: Two study groups, either receiving a simultaneous bilateral breast reconstruction, with double DIEP flaps (n = 152) in group 1, or double TMG flaps (n = 86) in group 2, were compared. A detailed risk and complication analysis was performed. Patient characteristics, operative time and the need for further operations were evaluated. Results: Double DIEP patients had donor site complications in 23.7% and double TMG patients in 16.3% (p = 0.9075, RR 1.45). Flap loss rates of 3.5% (double TMG) and 2.6% (double DIEP) were recorded (p = 0.7071, RR 1.33). The need for postoperative lipofilling was significantly higher in double TMG patients (65.1% vs. 38.2 %, p = 0.0047, RR 1.71). Conclusion: Complication analysis favors the double DIEP procedure. Donor site morbidity was lower and less severe in the double TMG group. Later fat grafting was more frequently needed after double TMG reconstructions. Further studies, preferably of prospective nature, are needed to evaluate the benefit of bilateral simultaneous breast reconstructions.

1 January 2018 in Journal of Plastic, Reconstructive & Aesthetic Surgery
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Journal Article
Closed access
Karl SchwaigerKarl Schwaiger
Karl Schwaiger
ERElisabeth Russe
Elisabeth Russe
Hassan KholosyHassan Kholosy
Hassan Kholosy
MHMichaela Hladik
Michaela Hladik
KHKlemens Heinrich
Klemens Heinrich
GWGottfried Wechselberger
Gottfried Wechselberger

26 November 2020 in Journal of Clinical Medicine
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Karl SchwaigerKarl Schwaiger
Karl Schwaiger
SASelim Abed
Selim Abed
ERElisabeth Russe
Elisabeth Russe
FKFabian Koeninger
Fabian Koeninger
JWJulia Wimbauer
Julia Wimbauer
Gottfried WechselbergerGottfried Wechselberger
Gottfried Wechselberger
Background: Proximal radial nerve lesions located between the brachial plexus and its division into the superficial and deep branches are rare but severe injuries. The majority of these lesions occur in association with humerus fractures, directly during trauma or later during osteosynthesis for fracture treatment. Diagnostics and surgical interventions are often delayed. The best type of surgical treatment and the outcome to be expected often is uncertain. Methods: Twelve patients with proximal radial nerve lesions due to trauma or prior surgery were included in this study and underwent neurolysis (n = 6) and sural nerve graft interposition (n = 6). Retrospective analysis of the collected patient data was performed and the postoperative course was systematically evaluated. The Disabilities of the Arm, Shoulder, and Hand (DASH) and the LSUHS (Louisiana State University Health Sciences) scores were used to determine regeneration after surgery. Comparison between the patients’ and calculated normative DASH scores was performed. Results: All patients had a traumatically or iatrogenically induced proximal radial nerve lesion and underwent secondary treatments. The average time from radial nerve lesion occurrence to surgical intervention was approximately four months (1.5–10 months). Eight patients (66.67%) had a humeral fracture. During follow up, no statistically significant difference between the calculated normative and the patients’ DASH scores was observed. The LSUHS scores were at least satisfactory. Conclusions: Neurolysis or sural nerve graft interposition performed within a specific period of time are the primary treatment options for radial nerve lesions. They should be performed depending on the lesion type. Regeneration to a satisfactory degree was observed in all patients, and the majority achieved full recovery of sensory and motor functions. This was the first study to highlight the efficiency of neurolysis and sural nerve graft interposition as secondary treatment interventions, especially for radial nerve lesions.

1 July 2019 in Medicine
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Journal Article
Open access
Karl SchwaigerKarl Schwaiger
Karl Schwaiger
FKFabian Koeninger
Fabian Koeninger
JWJulia Wimbauer
Julia Wimbauer
KHKlemens Heinrich
Klemens Heinrich
AGAlexandra Gala-Kokalj
Alexandra Gala-Kokalj
GWGottfried Wechselberger
Gottfried Wechselberger
Rationale: Papillary thyroid cancer accounts for up to 85% of all cases of thyroid carcinoma. This disease entity is notorious for metastatic invasion of adjacent lymph nodes, including the cervical lymph nodes, potentially presenting as a growing lateral neck mass. However, these lesions tend to be recognized and diagnosed soon due to the palpable mass. Patient concerns: This report describes a very rare case of a huge slow-growing neck metastasis based on a 6 mm papillary thyroid microcarcinoma. This patient presented with a painless, but continuously growing right lateral neck mass. Aside from that, no specific complaints were mentioned. Diagnosis: The underlying cause of this patient's neck mass turned out to be an occult papillary thyroid microcarcinoma (Ø 6 mm) with metastatic invasion and subsequent cystic degeneration of cervical lymph nodes. Accurate diagnosis was made after surgical intervention through histopathological analysis. Interventions: The patient underwent complete resection of the cervical mass in conjunction with total thyroidectomy and right cervical neck dissection, followed by adjuvant iodine- and chemotherapy. Outcome: Margin free surgical resection without any postoperative complications could be achieved. The patient received iodine supplementation and remained free of recurrence during regular clinical follow-ups for 2 years. The therapy was curative. Lessons: This case report emphasizes the importance of a thorough diagnostic work-up including preoperative tissue sampling of any cervical neck mass, since a benign appearance on imaging does not exclude a malignant process.