Publications by authors named "Johan Friso Lock"

Article Synopsis
  • A study compared minimally-invasive gastrectomy and open surgery, finding that the former provides similar cancer outcomes with fewer complications and shorter recovery times for gastric cancer patients in Europe.
  • Data was collected from primary bariatric surgeries and subsequent minimally-invasive gastrectomies, focusing on operation time, lymph node yield, and postoperative complications.
  • Results indicated that surgeons improved their skills over time, achieving high cancer removal rates, and overall safe outcomes, although robotic surgery had longer operation times compared to laparoscopic techniques.
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Background: Retrosternal oesophageal reconstructions with collar anastomoses can become necessary when the stomach is either unavailable for oesophageal replacement, or orthotopic reconstruction is deemed impractical. Our aim was to analyse our results regarding technical approaches and outcomes.

Materials And Methods: All patients undergoing primary and secondary oesophageal retrosternal reconstructions with collar anastomoses at our centre (2019-2023) were retrospectively analysed and individual surgical reconstruction options were presented.

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Importance: Surgical site infections frequently occur after open abdominal surgery. Intraoperative wound irrigation as a preventive measure is a common practice worldwide, although evidence supporting this practice is lacking.

Objective: To evaluate the preventive effect of intraoperative wound irrigation with polyhexanide solution.

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Purpose: Coronavirus disease 2019 (COVID-19) impacted health care systems around the world. Despite a decrease in emergency admissions, an increased number of complicated forms of diverticulitis was reported. It was the aim of this study to analyze the pandemic impact on diverticulitis management in Germany.

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Purpose: A correlation between the hospital volume and outcome is described for multiple entities of oncological surgery. To date, this has not been analyzed for the surgical treatment of sigmoid diverticulitis. The aim of this study was to explore the impact of the annual caseload per hospital of colon resection on the postoperative incidence of complications, failure to rescue, and mortality in patients with diverticulitis.

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Background: Gastric (anastomotic or staple-line) leaks after bariatric surgery are rare but potentially life-threatening complications. Endoscopic vacuum therapy (EVT) has evolved as the most promising treatment strategy for leaks associated with upper gastrointestinal surgery.

Objective: The aim of this study was to evaluate the efficiency of our gastric leak management protocol in all bariatric patients over a 10-year period.

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Background: Perioperative bridging of oral anticoagulation increases the risk of bleeding complications after elective general and visceral surgery. The aim of this study was to explore, whether an individual risk-adjusted bridging regimen can reduce bleeding events, while still protecting against thromboembolic events.

Methods: We performed a quality improvement study comparing bridging parameters and postoperative outcomes before (period 1) and after implementation (period 2) of a new risk-adjusted bridging regimen.

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Background: Pancreatic adenocarcinoma (PDAC) patients with preoperative carbohydrate antigen 19-9 (CA19-9) serum levels higher than 500 U/ml are classified as biologically borderline resectable (BR-B). To date, the impact of cholestasis on preoperative CA19-9 serum levels in these patients has remained unquantified.

Methods: Data on 3079 oncologic pancreatic resections due to PDAC that were prospectively acquired by the German Study, Documentation and Quality (StuDoQ) registry were analyzed in relation to preoperative CA19-9 and bilirubin serum values.

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Purpose: In selected cases of severe Cushing's syndrome due to uncontrolled ACTH secretion, bilateral adrenalectomy appears unavoidable. Compared with unilateral adrenalectomy (for adrenal Cushing's syndrome), bilateral adrenalectomy has a perceived higher perioperative morbidity. The aim of the current study was to compare both interventions in endogenous Cushing's syndrome regarding postoperative outcomes.

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Although abdominal foci are the second most common source of sepsis, only few studies focus on the optimal length of post-operative antibiotic therapy in critically ill patients with abdominal sepsis. The aim of this study was to compare the outcomes of short versus long antibiotic therapy as well as broad-spectrum penicillin versus carbapenem in patients with abdominal sepsis. We performed a single center retrospective study in patients with abdominal sepsis who underwent emergency surgery.

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Background: The adequate choice of perioperative antibiotic prophylaxis (PAP) could influence the risk of surgical site infections (SSIs) in general surgery. A new local PAP guideline was implemented in May 2017 and set the first-generation cefazolin (CFZ) instead the second-generation cefuroxime (CXM) as the new standard prophylactic antibiotic. The aim of this study was to compare the risk of SSIs after this implementation in intra-abdominal infections (IAIs) without sepsis.

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Background: Recent evidence suggests that short-course postoperative antibiotic therapy (PAT) of intra-abdominal infections is non-inferior considering clinical outcomes. The aim of this study was to compare the outcome of short vs. long PAT in complicated intra-abdominal infections (cIAIs) without sepsis.

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Background: Due to the COVID-19-related lockdown regulations, surgical clinics had to cut down elective procedures. The impact of the cancellation and postponing surgery on patients is unclear.

Methods: All patients from six hospitals with canceled surgery during the first lockdown (03/16-04/24/2020) were asked to answer a questionnaire.

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[Prevention of Surgical Site Infections].

Anasthesiol Intensivmed Notfallmed Schmerzther

July 2021

The burden of surgical site infections (SSIs) is increasing. The number of surgical procedures continues to rise, and surgical patients present increasingly complex comorbidities. Half of SSIs are deemed preventable using evidence-based strategies.

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Article Synopsis
  • Liver resection is the best treatment for hepatocellular carcinoma (HCC), but careful patient selection is crucial to avoid complications like postoperative liver failure.
  • The LiMAx® test was used to assess liver function in 92 HCC patients, revealing higher liver function in those who underwent surgery compared to those who did not.
  • Findings showed that LiMAx results help accurately identify patients who can safely have liver surgery, making it a valuable tool for selecting both cirrhotic and noncirrhotic patients.
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Background: The aim of this study was to assess the impact of antimicrobial stewardship interventions on surgical antibiotic prescription behavior in the management of non-elective surgical intra-abdominal infections, focusing on postoperative antibiotic use, including the appropriateness of indications.

Methods: A single-center quality improvement study with retrospective evaluation of the impact of antimicrobial stewardship measures on optimizing antibacterial use in intra-abdominal infections requiring emergency surgery was performed. The study was conducted in a tertiary hospital in Germany from January 1, 2016, to January 30, 2020, three years after putting a set of antimicrobial stewardship standards into effect.

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Article Synopsis
  • - The study investigates the relationship between hospital treatment volume and patient outcomes in abdominal surgeries, based on a review of 11 studies involving over 2 million patients in Germany.
  • - Findings reveal that higher volume hospitals have significantly lower in-house mortality rates and complications, especially for complex surgeries, compared to their lower volume counterparts.
  • - The research supports the notion that higher surgical volumes are linked to better patient outcomes, particularly in cases like sepsis, highlighting the importance of choosing high volume centers for complex abdominal procedures.
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Background: Diverticular disease is one of the more common abdominal disorders. In 2016, approximately 130 000 patients received inpatient treatment for diverticular disease in Germany. The disease has a number of subtypes, each of which has an appropriate treatment.

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Background: International consensus criteria (ICC) have redefined borderline resectability for pancreatic ductal adenocarcinoma (PDAC) according to three dimensions: anatomical (BR-A), biological (BR-B), and conditional (BR-C). The present definition acknowledges that resectability is not just about the anatomic relationship between the tumour and vessels but that biological and conditional dimensions also are important.

Methods: Patients' tumours were retrospectively defined borderline resectable according to ICC.

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Background: In recent years, there has been a significant change in the treatment recommendations for acute diverticulitis. In order to provide the right treatment to the individual patient, it is therefore important to classify the stage of the disease accurately, after taking various aspects into consideration.

Methods: Patients treated for acute diverticulitis in Würzburg University Hospital during 2010 to 2014 were included.

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The maximal liver function capacity (LiMAx) test, a novel C-methacetin breath test, has proven clinical validity in determining hepatic metabolic capacity. In contrast to prior C-methacetin breath test protocols, the LiMAx test is performed by intravenous body-weight-adjusted substrate administration. Furthermore, the DOB kinetics (delta over baseline of the time-dependent exhaled CO/CO ratio) are measured online at the bedside with a high time resolution in order to determine the maximum DOB.

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Purpose: Post-hepatectomy liver failure (PHLF) is the major risk factor for mortality after hepatectomy. Preoperative planning of the future liver remnant volume reduces PHLF rates; however, future liver remnant function (FLR-F) might have an even stronger predictive value. In this preliminary study, we used a new method to calculate FLR-F by the LiMAx test and computer tomography-assisted volumetric-analysis to visualize liver function changes after portal vein embolization (PVE) before extended hepatectomy.

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