Publications by authors named "Bernhard Kraemer"

Article Synopsis
  • Deep endometriosis (DE) is a severe form of endometriosis affecting deeper tissue layers and can cause various symptoms, including severe pain and organ dysfunction.
  • The article discusses the challenges in diagnosing and surgically treating DE at a Level III Endometriosis Center in Germany, highlighting the complexity of procedures and high rates of interdisciplinary collaboration.
  • Despite the intricate nature of the surgeries, severe postoperative complications are rare, occurring in only 3.1% of cases, emphasizing the importance of specialized treatment at advanced centers.
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Endometriosis is known to be a common chronic disease that often affects the quality of life of patients. Especially for deep endometriosis (DE), the most challenging form of the disease, surgery remains an important component of treatment. However, long-term outcomes after surgery are poorly studied.

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Introduction: The curriculum for a da Vinci surgeon in gynecology requires special training before a surgeon performs their first independent case, but standardized, objective assessments of a trainee's workflow or skills learned during clinical cases are lacking. This pilot study presents a methodology to evaluate intraoperative surgeon behavior in hysterectomy cases through standardized surgical step segmentation paired with objective performance indicators (OPIs) calculated directly from robotic data streams. This method can provide individual case analysis in a truly objective capacity.

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Importance: The formation of adhesions after gynecological surgery not only has detrimental impacts on those affected, including pain, obstruction, and infertility, but also imposes a high economic burden on healthcare systems worldwide.

Objective: The aim of this review was to evaluate the adhesion prevention potential of all currently available adhesion barriers for gynecological surgery.

Evidence Acquisition: We systematically searched MEDLINE and CENTRAL databases for randomized controlled trials (RCTs) on the use of adhesion barriers as compared with peritoneal irrigation or no treatment in gynecological surgery.

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Article Synopsis
  • Breast-conserving surgery with clear margins is the best treatment for early breast cancer, highlighting the need for accurate identification of normal versus cancerous tissue during operations.
  • This study used optical emission spectroscopy (OES) to analyze tissue samples from breast cancer patients, aiming to find distinct spectroscopic features for differentiating between healthy and malignant tissues.
  • With an average classification accuracy of 96.9% and high sensitivity and specificity rates, the study suggests that OES could potentially be used in real-time during surgeries to improve tissue margin assessment.
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Introduction: Psoriatic arthritis (PsA), a disease with complex inflammatory musculoskeletal manifestations, complicates psoriasis in up to 30% of patients. In this study, we aimed to determine the effect of an interdisciplinary dermatological-rheumatological consultation (IDRC) for patients with psoriasis with musculoskeletal symptoms.

Methods: This prospective study enrolled 202 patients with psoriasis.

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Background: Recently, we showed a >60% difference in 5-year survival for patients with tubo-ovarian high-grade serous carcinoma (HGSC) when stratified by a 101-gene mRNA expression prognostic signature. Given the varied patient outcomes, this study aimed to translate prognostic mRNA markers into protein expression assays by immunohistochemistry and validate their survival association in HGSC.

Methods: Two prognostic genes, FOXJ1 and GMNN, were selected based on high-quality antibodies, correlation with protein expression and variation in immunohistochemical scores in a preliminary cohort (n = 134 and n = 80, respectively).

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Introduction: A novel multipurpose bipolar radiofrequency instrument, the Erbe Dissector (EDS), which simultaneously seals and cuts tissue, was developed. sealing rate and time, burst pressure, jaw temperature and thermal spread were studied in porcine renal arteries.

Material And Methods: , 13 surgical tasks were performed in two pigs: beside sealing rate and time, overall performance in sharp and blunt dissection, tissue sticking, hemostasis, precision, etc.

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Article Synopsis
  • The study looked at cancer-related mutations in patients with different types of endometriosis to see how they vary.
  • It found that out of 27 patients, 13 had important mutations, and 9 of them had the same mutations in different parts of their condition.
  • The researchers suggest that endometriosis might be caused by multiple related issues and that doctors should consider genetic information for better diagnosis and treatment.
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Purpose: Endometriosis is a benign, but potentially serious gynaecological condition in terms of abdominal pain and impaired fertility. Laparoscopic excision techniques are considered the therapeutic standard. HybridAPC is presented as a novel technique for the non-contact thermal ablation of peritoneal endometriosis with simultaneous protection of the underlying thermosensitive structures by creating a needle-free elevated fluid cushion which enables a safer exposure and distance, as well as potentially improved peritoneal conditioning prior to APC.

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ARID1A (BAF250a) is a component of the SWI/SNF chromatin modifying complex, plays an important tumour suppressor role, and is considered prognostic in several malignancies. However, in ovarian carcinomas there are contradictory reports on its relationship to outcome, immune response, and correlation with clinicopathological features. We assembled a series of 1623 endometriosis-associated ovarian carcinomas, including 1078 endometrioid (ENOC) and 545 clear cell (CCOC) ovarian carcinomas, through combining resources of the Ovarian Tumor Tissue Analysis (OTTA) Consortium, the Canadian Ovarian Unified Experimental Resource (COEUR), local, and collaborative networks.

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Objectives: Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases. We aimed to investigate the prevalence and risk factors for hyperhomocysteinemia, especially modifiable lifestyle factors, such as smoking behaviour and dietary factors.

Design: Population-based cross-sectional study.

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The shorter cervical segment after classic radical trachelectomy (RT) imposes a number of pregnancy associated risk factors. In this aspect, large conization (LC) could be an oncologically safe alternative to RT in young women with early stage cervical cancer who want to spare their fertility. Our aim was to evaluate fertility-sparing surgical treatment of early stage cervical cancer after the introduction of LC.

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Purpose: The rates of hysterectomy are falling worldwide, and the surgical approach is undergoing a major change. To avoid abdominal hysterectomy, a minimally invasive approach has been implemented. Due to the increasing rates of subtotal hysterectomy, we are faced with the following questions: how often does the cervical stump have to be removed secondarily, and what are the indications?

Methods: This was a retrospective, single-centre analysis of secondary resection of the cervical stump conducted from 2004 to 2018.

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Clinical decision support systems (CDSS) help to improve the diagnostics and treatment of rare diseases (RD). As one of four funded consortia of the Medical Informatics Initiative supported by the Federal Ministry of Education and Research (BMBF, Germany), MIRACUM develops a clinical decision support system (CDSS) for RD based on distributed data of ten university hospitals. The CDSS will be developed at the Rare Diseases Centres (RDC) of the MIRACUM consortium.

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Background: Electrosurgical vessel sealers are gradually replacing conventional techniques such as ligation and clipping. Algorithms that control electrosurgical units (ESU), known as modes, are important for applications in different surgical disciplines. This chronic porcine animal study aimed to evaluate the safety and effectiveness of the novel thermoSEAL electrosurgical vessel sealing mode (TSM).

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Waterjet dissection of the inferior hypogastric plexus (IHP) resulted in a more rapid return of normal urodynamics than blunt dissection (control group) in patients who received laparoscopic nerve-sparing radical hysterectomy (NSRH) in a randomized controlled study. However, the definite reasons for these results were unknown. This subgroup analysis compared the neural areas and impairment in the IHP uterine branches harvested during NSRH as an alternative to the IHP vesical branches between the waterjet and control groups.

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With growing prevalence, end-stage renal disease (ESRD) as well as critical limb ischemia (CLI) are both conditions associated with high morbidity and mortality rates. Patients and methods: A retrospective single-centre study provided data of a German interdisciplinary vascular centre. Seventy-seven consecutive haemodialysis (HD) inpatients (median age, 73.

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Purpose: The interface between surgeon and the laparoscopic instrument is an important factor in biomechanical stress that may increase the risk of musculoskeletal complaints in surgeons. This article investigates the effect of a laparoscopic instrument with a rotatable handle piece (rot-HP) on muscular stress and fatigue during routine laparoscopic procedures (LP) as well as usability, wrist posture and working precision.

Methods: 40 LP (subtotal hysterectomies) performed by 11 surgeons were investigated.

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Background: This prospective, randomized, controlled, single-blinded study investigates the peritoneal adhesion formation of HybridAPC (waterjet elevation of the peritoneum with subsequent argon plasma coagulation) versus only waterjet (elevation with the same instrument, but without subsequent argon plasma coagulation) in a rat model (24 female Wistar rats).

Materials And Methods: Bilateral lesions were created on the abdominal wall with HybridAPC on one sidewall and waterjet elevation on the other sidewall of the peritoneum in a standard fashion. After 10 days, the rats were euthanized to evaluate the peritoneal trauma sites.

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Purpose: This study aimed at evaluating the diagnostic yield for core needle biopsies of uterine fibroids before laparoscopic radiofrequency volumetric thermal ablation (RFVTA) with the aim of sonographic imaging. This study was in the context of a randomized, prospective, single-center, longitudinal comparative study in which RFVTA and laparoscopic myomectomy for symptomatic uterine fibroids were compared.

Methods: All patients of the RFVTA-arm received a core needle biopsy under the guidance of an intraoperative laparoscopic ultrasound system.

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Objective To evaluate the effect of a laparoscopic instrument with a 360° rotatable handle piece (rot-HP) on biomechanical stress and precision in different areas of a simulated operating field at two working heights. Background Surgeons performing laparoscopic procedures are exposed to biomechanical stress and have an increased risk of musculoskeletal complaints. Method Fifty-seven healthy subjects (27 men, median age 26) without experience in laparoscopy performed a precision task in four quadrants (A-D) of the operating field using the rot-HP or a common fixed handle piece (fixed-HP) at an individually adjusted lower or higher working height.

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The objective of this study was to examine the relevance of pelvic and para-aortic lymph node involvement and the tumour characteristics affecting nodal metastases and survival in primary advanced ovarian cancer. A total of 130 consecutive patients were retrospectively investigated. All the patients received stage-related surgery with pelvic and para-aortic lymphadenectomy.

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