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21
result(s) for
"Karenovics, Wolfram"
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Comparison of postoperative complications between segmentectomy and lobectomy by video-assisted thoracic surgery: a multicenter study
by
Krull, Matthieu
,
Karenovics, Wolfram
,
Perentes, Jean Yannis
in
Adult
,
Aged
,
Aged, 80 and over
2019
Background
Compared to lobectomy by video-assisted thoracic surgery (VATS), segmentectomy by VATS has a potential higher risk of postoperative atelectasis and air leakage. We compared postoperative complications between these two procedures, and analyzed their risk factors.
Methods
We reviewed the records of all patients who underwent anatomical pulmonary resections by VATS from January 2014 to March 2018 in two Swiss university hospitals. All complications were reported. A logistic regression model was used to compare the risks of complications for the two interventions. Adjustment for patient characteristics was performed using a propensity score, and by including risk factors separately.
Results
Among 690 patients reviewed, the major indication for lung resection was primary lung cancer (86.4%) followed by metastasis resection (5.8%), benign lesion (3.9%), infection (3.2%) and emphysema (0.7%). Postoperatively, there were 80 instances (33.3%) of complications in 240 segmentectomies, and 171 instances (38.0%) of complications in 450 lobectomies (
P
= 0.73). After adjustment for the patient’s propensity to be treated by segmentectomy rather than lobectomy, the risks of a complication remained comparable for the two techniques (odds ratio for segmentectomy 0.91 (0.61–1.30),
p
= 0.59). Length of hospital stay and drainage duration were shorter after segmentectomy. On multivariate analysis, an American Society of Anesthesiologists score above 2 and a forced expiratory volume in one second below 80% of predicted value were significantly associated with the occurrence of complications.
Conclusions
The rate of complications and their grade were similar between segmentectomy and lobectomy by VATS.
Journal Article
Restricted, optimized or liberal fluid strategy in thoracic surgery: A narrative review
by
Bedat, Benoit
,
Ellenberger, Christoph
,
Karenovics, Wolfram
in
acute lung injury; cardiac output; glycocalyx; normovolemia
,
Acute respiratory distress syndrome
,
Review
2021
Perioperative fluid balance has a major impact on clinical and functional outcome, regardless of the type of interventions. In thoracic surgery, patients are more vulnerable to intravenous fluid overload and to develop acute respiratory distress syndrome and other complications. New insight has been gained on the mechanisms causing pulmonary complications and the role of the endothelial glycocalix layer to control fluid transfer from the intravascular to the interstitial spaces and to promote tissue blood flow. With the implementation of standardized processes of care, the preoperative fasting period has become shorter, surgical approaches are less invasive and patients are allowed to resume oral intake shortly after surgery. Intraoperatively, body fluid homeostasis and adequate tissue oxygen delivery can be achieved using a normovolemic therapy targeting a \"near-zero fluid balance\" or a goal-directed hemodynamic therapy to maximize stroke volume and oxygen delivery according to the Franck-Starling relationship. In both fluid strategies, the use of cardiovascular drugs is advocated to counteract the anesthetic-induced vasorelaxation and maintain arterial pressure whereas fluid intake is limited to avoid cumulative fluid balance exceeding 1 liter and body weight gain (~1-1.5 kg). Modern hemodynamic monitors provide valuable physiological parameters to assess patient volume responsiveness and circulatory flow while guiding fluid administration and cardiovascular drug therapy. Given the lack of randomized clinical trials, controversial debate still surrounds the issues of the optimal fluid strategy and the type of fluids (crystalloids versus colloids). To avoid the risk of lung hydrostatic or inflammatory edema and to enhance the postoperative recovery process, fluid administration should be prescribed as any drug, adapted to the patient's requirement and the context of thoracic intervention.
Journal Article
Effectiveness of rib fixation compared to pain medication alone on pain control in patients with uncomplicated rib fractures: study protocol of a pragmatic multicenter randomized controlled trial—the PAROS study (Pain After Rib OSteosynthesis)
by
Terrier, Philippe
,
Karenovics, Wolfram
,
Krueger, Thorsten
in
Analgesics
,
Biomedicine
,
Care and treatment
2022
Background
Persistent pain and disability following rib fractures result in a large psycho-socio-economic impact for health-care system. Benefits of rib osteosynthesis are well documented in patients with flail chest that necessitates invasive ventilation. In patients with uncomplicated and simple rib fractures, indication for rib osteosynthesis is not clear. The aim of this trial is to compare pain at 2 months after rib osteosynthesis versus medical therapy.
Methods
This trial is a pragmatic multicenter, randomized, superiority, controlled, two-arm, not-blinded, trial that compares pain evolution between rib fixation and standard pain medication versus standard pain medication alone in patients with uncomplicated rib fractures. The study takes place in three hospitals of Thoracic Surgery of Western Switzerland. Primary outcome is pain measured by the brief pain inventory (BPI) questionnaire at 2 months post-surgery. The study includes follow-up assessments at 1, 2, 3, 6, and 12 months after discharge. To be able to detect at least 2 point-difference on the BPI between both groups (standard deviation 2) with 90% power and two-sided 5% type I error, 46 patients per group are required. Adjusting for 10% drop-outs leads to 51 patients per group.
Discussion
Uncomplicated rib fractures have a significant medico-economic impact. Surgical treatment with rib fixation could result in better clinical recovery of patients with uncomplicated rib fractures. These improved outcomes could include less acute and chronic pain, improved pulmonary function and quality of life, and shorter return to work. Finally, surgical treatment could then result in less financial costs.
Trial registration
ClinicalTrials.gov
NCT04745520
. Registered on 8 February 2021.
Journal Article
How can we minimize the risks by optimizing patient's condition shortly before thoracic surgery?
by
Bedat, Benoit
,
Ellenberger, Christoph
,
Karenovics, Wolfram
in
aerobic capacity; exercise training; nutrition
,
Lung cancer
,
Physical fitness
2021
The \"moderate-to-high-risk\" surgical patient is typically older, frail, malnourished, suffering from multiple comorbidities and presenting with unhealthy life style such as smoking, hazardous drinking and sedentarity. Poor aerobic fitness, sarcopenia and \"toxic\" behaviors are modifiable risk factors for major postoperative complications. The physiological challenge of lung cancer surgery has been likened to running a marathon. Therefore, preoperative patient optimization or \" prehabilitation \" should become a key component of improved recovery pathways to enhance general health and physiological reserve prior to surgery. During the short preoperative period, the patients are more receptive and motivated to adhere to behavioral interventions (e.g., smoking cessation, weaning from alcohol, balanced food intake and active mobilization) and to follow a structured exercise training program. Sufficient protein intake should be ensured (1.5-2 g/kg/day) and nutritional defects should be corrected to restore muscle mass and strength. Currently, there is strong evidence supporting the effectiveness of various modalities of physical training (endurance training and/or respiratory muscle training) to enhance aerobic fitness and to mitigate the risk of pulmonary complications while reducing the hospital length of stay. Multimodal interventions should be individualized to the patient's condition. These bundle of care are more effective than single or sequential intervention owing to synergistic benefits of education, nutritional support and physical training. An effective prehabilitation program is necessarily patient-centred and coordinated among health care professionals (nurses, primary care physician, physiotherapists, nutritionists) to help the patient regain some control over the disease process and improve the physiological reserve to sustain surgical stress.
Journal Article
Overall survival of recurrent/metastatic head & neck squamous cell carcinoma patients progressing after ≥ 1 line of systemic therapy, treated with MVX-ONCO-1, a novel, first in class cell encapsulation-based immunotherapy: results of SAKK 11/16, a phase IIa trial
by
Dulguerov, Nicolas
,
Urwyler, Muriel
,
Joerger, Markus
in
Adjuvants
,
Advanced solid tumors
,
Antibodies
2025
Background
Over the past two decades, most cancer vaccines have failed to be developed clinically. The lack of efficient priming with specific tumor antigens and/or weak adjuvants may explain this poor success rate. MVX-ONCO-1, a personalized cell-based vaccine, combines inactivated autologous tumor cells and encapsulated allogeneic human cells genetically engineered to produce granulocyte–macrophage colony stimulating factor (GM-CSF). This unique technology allows sustained local delivery of strong adjuvant at the vaccination site. The combination of inactivated autologous tumor cells and potent local adjuvant delivery addresses these two unmet critical steps and may recapitulate in patients the successful combination observed in experimental models.
Methods
The SAKK 11/16, a Phase IIa trial with Overall Survival (OS) as the primary endpoint was the first efficacy study evaluating MVX-ONCO-1. Patients with Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (R/M HNSCC) progressing after at least one line of systemic therapy were enrolled with 50% of patients alive at 26 weeks as the primary objective.
Results
In this hard-to-treat population, SAKK 11/16 met the primary endpoint, with 68.8% of patients alive at 6 months. The median OS was 11.4 months, with 32% of the patients alive after 18 months. Complete and partial responses were observed on MVX-ONCO-1 monotherapy.
Moreover, all patients who developed a positive DTH reaction to their tumor cells upon vaccination survived at 12 months. Additionally, patients living for more than 12 months had higher circulating antibody titers against tumor-associated antigens. Explorative analysis looking at median OS from the start of anti-PD-1 therapy was 21.7 months.
In addition, no new safety signals with no systemic adverse events (AE) related to the treatment and no manufacturing issues were observed in this multicenter trial.
Conclusions
These findings suggest that MVX-ONCO-1 can induce a coordinated immune response with clinical benefits as a standalone treatment, leading to prolonged survival. This effect may be enhanced by previous exposure to immune checkpoint inhibitors.
Trial registration
(ClinicalTrials.gov): NCT02999646.
Journal Article
Thoracoscopic lobectomy: is a training program feasible with low postoperative morbidity?
2013
Objective
To evaluate the feasibility of training program in video assisted thoracic surgery (VATS) lobectomy comparing intraoperative and postoperative data of patients operated on by an established consultant and trainees.
Methods
Retrospective analysis of 100 consecutive patients who underwent VATS lobectomies between May 2008 and May 2012. 66 patients were operated on by an established consultant (Group A) and 34 by trainees (Group B).
Results
The groups were comparable for clinical characteristics and pathological staging. The mean operating time in Group A was 125 ± 30 min and in Group B was 133 ± 26 min (
p
= 0.18). The rate of conversion was similar in both groups: 9.1 % in Group A and 8.8 % in Group B (
p
= 0.6). The complication rate was comparable (
p
= 0.4): 36.3 % in Group A and 32.3 % in Group B. Median time to drain removal and median length of hospital stay was 3 and 5.5 days in Group A and 3 and 5 days in Group B, showing no statistical differences between the two groups (
p
= 0.3 and 0.5). There were no differences in term of long-term complications between the two groups.
Conclusion
Our study showed that a training program in VATS lobectomy is feasible, without increasing the operative time, conversion rate, postoperative complication, time to drain removal, and length of hospital stay.
Journal Article
Intra-Operative Indocyanine Green Angiography of the Parathyroid Gland
by
Vidal Fortuny, Jordi
,
Karenovics, Wolfram
,
Sadowski, Samira M.
in
Abdominal Surgery
,
Angiography
,
Cardiac Surgery
2016
Major complications of thyroid and parathyroid surgery are recurrent laryngeal nerve injuries and definitive hypoparathyroidism. The use of intra-operative Indocyanine Green Angiography for confirmation of vascular status of the parathyroid gland is reported here.
Journal Article
Pulmonary sequestration with haemoptysis and an unsuspected carcinoid tumour
by
Nowak, Kai
,
Karenovics, Wolfram
,
Padley, Simon
in
Abdomen
,
Adult
,
Bronchopulmonary Sequestration - complications
2013
We report the case of a fit and healthy 41-year-old man, who presented with significant haemoptysis without a history of recurrent infections. His computed tomography scan showed a dense lesion in the left lower lobe with a feeding vessel arising from the abdominal aorta, characteristic for an intra-pulmonary sequestration. To prevent possible further haemoptysis or infections, a left lower lobectomy was performed. The histological examination showed the typical features of a sequestration. However, within the sequestration, a carcinoid tumour without atypical features was found. There was no lymph node involvement. Sequestrations are congenital lesions without communication with the bronchial tree and with a systemic blood supply. They commonly cause recurrent infection. Fatal haemoptysis has also been described, but is rare. There are very few reports of neoplastic lesions in sequestrations. This case illustrates two unusual aspects of sequestrations. Surgery offers definitive treatment for both pathologies, as opposed to embolisation.
Journal Article
Intraoperative Autofluorescence and Indocyanine Green Angiography for the Detection and Preservation of Parathyroid Glands
by
Karenovics, Wolfram
,
Triponez, Frédéric
,
Demarchi, Marco Stefano
in
Cameras
,
Clinical medicine
,
Endocrine system
2020
Fluorescence imaging is a well-known method for both the in vivo and in vitro identification of specific cells or tissues. This imaging tool is gaining importance in the intraoperative detection and preservation of parathyroid glands during endocrine surgery owing to the intrinsic properties of parathyroid tissue. The aim of this paper is to provide an overview of the basics of the technology, its history, and the recent surgical intraoperative applications of near-infrared imaging methods. Moreover, a literature review of the utilization of fluorescence devices in thyroid surgery suggests that the use of near-infrared imaging seems to be beneficial in reducing postoperative hypoparathyroidism, which is one of the most frequent complications of thyroid surgery.
Journal Article
Modification of the Surgical Strategy for the Dissection of the Recurrent Laryngeal Nerve Using Continuous Intraoperative Nerve Monitoring
by
Bedat, Benoit
,
Karenovics, Wolfram
,
Peloni, Giuseppe
in
Abdominal Surgery
,
Cardiac Surgery
,
Dissection
2018
Background
The aim of this study was to describe first experiences and changes in management using continuous intraoperative neuromonitoring (C-IONM) in thyroid and parathyroid surgery.
Method
Retrospective analysis of patients who underwent surgery with C-IONM since 2012. Surgical maneuvers were modified when electrophysiologic events occurred. Patients with persistent loss of signal (LOS) underwent postoperative laryngoscopy.
Results
One hundred and one patients (of 1586 neck surgeries) were included and 19 had events: In 13 these were temporary (resolved before end of surgery) and led to intraoperative modifications in surgical approach; in all cases traction was released, and in 8, recurrent laryngeal nerve (RLN) approach was changed [superior approach (2), inferior approach (2), both (4)]. Six patients had persistent LOS (5.9%, present at end of procedure), with RLN palsy (RLNP) on postoperative day 1: In three, LOS occurred at electrode placement on the vagus nerve, leading to distal placement of the electrode allowing ipsilateral dissection under continuous monitoring; all three had complete recovery at 6 months. In the three other patients, LOS occurred on the RLN: one probable thermal, one traction lesion and one accidental section of the anterior RLN branch. The RLN recovered within 6 months in two patients, and in the third, RLNP persisted after 6 months (1/101 = 1%).
Conclusion
C-IONM provides real-time evaluation of the RLN function, allowing for adaptation of surgical maneuvers to prevent RLNP. It seems particularly useful in difficult cases like redo neck surgery, invasive thyroid cancer and intrathoracic or large goiter. Care should be given at electrode placement on the vagus nerve.
Journal Article