Jonas Raakow

Dr. Jonas Raakow

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Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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11 June 2021 in Cancers
Verified
Journal Article
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UFUli Fehrenbach
Uli Fehrenbach
TWTilo Wünsch
Tilo Wünsch
PGPia Gabriel
Pia Gabriel
LSLaura Segger
Laura Segger
TYTakeru Yamaguchi
Takeru Yamaguchi
DGDominik Geisel
Dominik Geisel
Background: To assess the impact of body composition imaging biomarkers in computed tomography (CT) on the perioperative morbidity and survival after surgery of patients with esophageal cancer (EC). Methods: Eighty-five patients who underwent esophagectomy for locally advanced EC after neoadjuvant therapy between 2014 and 2019 were retrospectively enrolled. Pre- and postoperative CT scans were used to assess the body composition imaging biomarkers (visceral (VAT) and subcutaneous adipose tissue (SAT) areas, psoas muscle area (PMA) and volume (PMV), total abdominal muscle area (TAMA)). Sarcopenia was defined as lumbar skeletal muscle index (LSMI) ≤38.5 cm2/m2 in women and ≤52.4 cm2/m2 in men. Patients with a body mass index (BMI) of ≥30 were considered obese. These imaging biomarkers were correlated with major complications, anastomotic leakage, postoperative pneumonia, duration of postoperative hospitalization, disease-free survival (DFS), and overall survival (OS). Results: Preoperatively, sarcopenia was identified in 58 patients (68.2%), and sarcopenic obesity was present in 7 patients (8.2%). Sarcopenic patients were found to have an elevated risk for the occurrence of major complications (OR: 2.587, p = 0.048) and prolonged hospitalization (32 d vs. 19 d, p = 0.040). Patients with sarcopenic obesity had a significantly higher risk for postoperative pneumonia (OR: 6.364 p = 0.018) and a longer postoperative hospital stay (71 d vs. 24 d, p = 0.021). Neither sarcopenia nor sarcopenic obesity was an independent risk factor for the occurrence of anastomotic leakage (p > 0.05). Low preoperative muscle biomarkers (PMA and PMV) and their decrease (ΔPMV and ΔTAMA) during the follow-up period significantly correlated with shorter DFS and OS (p = 0.005 to 0.048). Conclusion: CT body composition imaging biomarkers can identify high-risk patients with locally advanced esophageal cancer undergoing surgery. Sarcopenic patients have a higher risk of major complications, and patients with sarcopenic obesity are more prone to postoperative pneumonia. Sarcopenia and sarcopenic obesity are both subsequently associated with a prolonged hospitalization. Low preoperative muscle mass and its decrease during the postoperative follow-up are associated with lower DFS and OS.

15 February 2019 in Surgical Endoscopy
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Journal Article
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SMSalvador Morales-Conde
Salvador Morales-Conde
APAndrea Peeters
Andrea Peeters
YMYannick M Meyer
Yannick M Meyer
SAStavros A Antoniou
Stavros A Antoniou
IAIsaías Alarcón Del Agua
Isaías Alarcón Del Agua
NBNicole D Bouvy
Nicole D Bouvy
Background Laparoscopic surgery changed the management of numerous surgical conditions. It was associated with many advantages over open surgery, such as decreased postoperative pain, faster recovery, shorter hospital stay and excellent cosmesis. Since two decades single-incision endoscopic surgery (SIES) was introduced to the surgical community. SIES could possibly result in even better postoperative outcomes than multi-port laparoscopic surgery, especially concerning cosmetic outcomes and pain. However, the single-incision surgical procedure is associated with quite some challenges. Methods An expert panel of surgeons has been selected and invited to participate in the preparation of the material for a consensus meeting on the topic SIES, which was held during the EAES congress in Frankfurt, June 16, 2017. The material presented during the consensus meeting was based on evidence identified through a systematic search of literature according to a pre-specified protocol. Three main topics with respect to SIES have been identified by the panel: (1) General, (2) Organ specific, (3) New development. Within each of these topics, subcategories have been defined. Evidence was graded according to the Oxford 2011 Levels of Evidence. Recommendations were made according to the GRADE criteria. Results In general, there is a lack of high level evidence and a lack of long-term follow-up in the field of single-incision endoscopic surgery. In selected patients, the single-incision approach seems to be safe and effective in terms of perioperative morbidity. Satisfaction with cosmesis has been established to be the main advantage of the single-incision approach. Less pain after single-incision approach compared to conventional laparoscopy seems to be considered an advantage, although it has not been consistently demonstrated across studies. Conclusions Considering the increased direct costs (devices, instruments and operating time) of the SIES procedure and the prolonged learning curve, wider acceptance of the procedure should be supported only after demonstration of clear benefits.

12 December 2020 in Journal of Clinical Medicine
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Journal Article
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PFPanagiotis Fikatas
Panagiotis Fikatas
IMIoannis-Fivos Megas
Ioannis-Fivos Megas
KMKiriaki Mantouvalou
Kiriaki Mantouvalou
IAIbrahim Alkatout
Ibrahim Alkatout
SCSascha S. Chopra
Sascha S. Chopra
JRJonas Raakow
Jonas Raakow
Nuck’s hydroceles, which develop in a protruding part of the parietal peritoneum into the female inguinal canal, are rare abnormalities and a cause of inguinal swelling, mostly resulting in pain. They appear when this evagination of the parietal peritoneum into the inguinal canal fails to obliterate. Our review of the literature on this topic included several case reports and two case series that presented cases of Nuck hydroceles which underwent surgical therapy. We present six consecutive cases of symptomatic hydroceles of Nuck’s canal from September 2016 to January 2020 at the Department of Surgery of Charité Berlin. Several of these patients had a long history of pain and consecutive consultations to outpatient clinics without diagnosis. These patients underwent laparoscopic or conventional excision and if needed simultaneous hernioplasty in our institution. Ultrasonography and/or Magnetic Resonance Imaging were used to display the cystic lesion in the inguinal area, providing the diagnosis of Nuck’s hydrocele. This finding was confirmed intraoperatively and by histopathological review. Ultrasound and magnetic resonance imaging (MRI) captures, intraoperative pictures and video of minimal invasive treatment are provided. Nuck’s hydroceles should be included in the differential diagnosis of an inguinal swelling. We recommend an open approach to external Type 1 Nuck´s hydroceles and a laparoscopic approach to intra-abdominal Type 2 Nuck hydroceles. Complex hydroceles like Type 3 have to be evaluated individually, as they are challenging and the surgical outcome is dependent on the surgeon’s skills. If inguinal channel has been widened by the presence of a Nuck’s hydrocele, a mesh plasty, as performed in hernia surgery, should be considered.

28 January 2020 in Surgical Endoscopy
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Journal Article
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JRJonas Raakow
Jonas Raakow
DKDenis Klein
Denis Klein
ABAtakan Görkem Barutcu
Atakan Görkem Barutcu
Matthias BieblMatthias Biebl
Matthias Biebl
JPJohann Pratschke
Johann Pratschke
RRRoland Raakow
Roland Raakow
Introduction: Several studies and meta-analysis showed Single-port or Single-incision laparoscopic surgery (SPL) to be superior over Multiport laparoscopic surgery (MPL) mainly in terms of postoperative pain and cosmetic result. But very little is known whether these results are only a short-term effect or are persistent on the long run after SPL. We therefore evaluated and compared long-term outcomes regarding cosmesis and chronic pain after SPL and MPL. Methods: We conducted a comparative study with propensity score matching of all patients undergoing SPL or MPL between October 2008 and December 2013 in terms of postoperative cosmetic results and chronic pain. Follow-up data were obtained from mailed patient questionnaires and telephone interviews. Postoperative cosmesis was assessed using the patients overall scar opinion on a 10-point scale and the Patients scale of the standardized Patient and Observer Scar assessment scale (POSAS). Chronic pain was assessed by 10-point scales for abdominal and umbilical scar pain. Results: A total of 280 patients were included in the study with 188 patients (67.1%) after SPL and 92 patients (32.9%) following MPL. 141 patients (50.4%) underwent a cholecystectomy and 139 patients (49.6%) underwent an appendectomy. The mean follow-up time was 61.1 ± 19.1 months. The mean wound satisfaction assed by the overall scar and the PSOAS Patients scale score of the patients showed no significant difference between MPL and SPL. Patients after SPL reported more overall complains than after MPL (8.7% vs. 2.5%, respectively), but without statistical significance (p = 0.321). Umbilical pain scores were comparable between the two groups (1.4 ± 1.0 vs. 1.4 ± 1.0, p = 0.831). Conclusion: We found no difference in long-term cosmetic outcomes after SPL and MPL. Chronic pain at the umbilical incision site was comparable on the long run.

12 March 2019 in Surgical Endoscopy
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ABAtakan Görkem Barutcu
Atakan Görkem Barutcu
DKDenis Klein
Denis Klein
MKMaik Kilian
Maik Kilian
Matthias BieblMatthias Biebl
Matthias Biebl
RRRoland Raakow
Roland Raakow
JRJonas Raakow
Jonas Raakow

29 August 2018 in Hernia
Verified
Journal Article
Closed access
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JRJonas Raakow
Jonas Raakow
JSJ. Schulte-Mäter
J. Schulte-Mäter
YCY. Callister
Y. Callister
MAM. Aydin
M. Aydin
CDC. Denecke
C. Denecke
MKM. Kilian
M. Kilian