Christian Ramesmayer

Dr. Christian Ramesmayer

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Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

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

Representative Publications

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14 October 2022 in World Journal of Urology
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Journal Article
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MLMichael Lotterstätter
Michael Lotterstätter
SSStephan Seklehner
Stephan Seklehner
FWFlorian Wimpissinger
Florian Wimpissinger
JGJozsef Gombos
Jozsef Gombos
JBJasmin Bektic
Jasmin Bektic
CRChristian Ramesmayer
Christian Ramesmayer
Purpose: To determine the safety and efficacy of transurethral resection of the prostate (TUR-P) in patients 85 years or older. Methods: In this retrospective, multicentre study, patients equal or older than 85 years at the time of surgery (2015–2020) were included. Several pre-, peri- and postoperative parameters were collected. The main outcome criterion was spontaneous voiding with a post-void residual (PVR) volume < 100 ml at dismission and at 12 months after surgery. Results: One hundred sixty-eight patients (median age: 87 years, interquartile range [IQR]: 86–89) were recruited. The patients took on average 5.2 permanent medications (3–8), 107 (64%) were anticoagulated preoperatively and neurological co-morbidities were present in 29 (17%). The indication for surgery was recurrent urinary retention in 66.3% (n = 110) with a mean retention volume of 849 ml. The mean PVR volume of the remaining 35% was 146 ml. Surgery was successfully completed in all patients. A perioperative surgical revision had to be performed in 3% and 13 patients (7.7%) required blood transfusion. After catheter removal, 85% of patients were able to void spontaneously with a PVR < 100 ml, and 14.3% were dismissed with a catheter. Twelve months data were available for 93 patients (55%). Of this cohort, 78 (83.9%) were able to void spontaneously with a PVR < 100 ml, 12 (12.9%) were on permanent catheterization. One patient (0.6%) died perioperatively. The only significant factor associated with an unsuccessful outcome was the number of permanent medications (6.8 vs. 5.0, p = 0.005). Conclusion: This retrospective multicentre study documents the safety and efficacy of TURP (monopolar and bipolar) in the old-old cohort.

7 March 2023 in BMC Urology
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Journal Article
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CRChristian Ramesmayer
Christian Ramesmayer
MPMaximilian Pallauf
Maximilian Pallauf
RGRicarda Gruber
Ricarda Gruber
TKThomas Kunit
Thomas Kunit
DODavid Oswald
David Oswald
MMMichael Mitterberger
Michael Mitterberger
Uretero-neocystostomy (UNC) is the gold-standard for distal-ureter repair. Whether the surgery should be conducted minimally invasive (laparoscopic (LAP), robotic RAL)) or open remains unanswered by the literature. Retrospective analysis of surgical outcome of patients treated with UNC for distal ureteral stenosis (January 2012 - October 2021). Patient demographics, estimated blood loss (EBL), surgical technique, operative time, complications and length of hospital stay (LOS) were recorded. During the follow-up period, patient underwent renal ultrasound and kidney function tests. Success was defined as relieve of symptoms or no findings of obstruction needing urine drainage. 60 patients were included (9 RAL, 25 LAP, 26 open). The different cohorts were similar of age, gender, American Society of Anesthesiologists (ASA) score, body-mass index and history of prior treatment of the ureter. No intraoperative complications were detected in all groups. There was no conversion to open surgery in the RAL group, whereas one was found in the LAP arm. Six patients had a recurrent stricture, but with no significant difference between the cohorts. EBL was not different between the groups. LOS was significantly lower in the RAL + LAP group compared to open (7 vs. 13 days, p = 0.005) despite significantly longer operating times (186 vs. 125.5 min, p = 0.005). Minimal invasive UNC, especially RAL, is a feasible and safe surgical method and provides similar results in terms of success rates in comparison to open approach. A shorter LOS could be detected. Further prospective studies need to be done.

Verified
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Open access
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SDSusanne Deininger
Susanne Deininger
ADAnna Dieplinger
Anna Dieplinger
WLWanda Lauth
Wanda Lauth
Lukas LusuardiLukas Lusuardi
Lukas Lusuardi
PTPeter Törzsök
Peter Törzsök
CRChristian Ramesmayer
Christian Ramesmayer
Background: The selection of suitable patients for the surgical treatment of benign prostatic obstruction (BPO) is a challenge in persons ≥75 years of age. Methods: After a systematic literature search of PubMed, 22 articles were included in this review. Clinical and functional parameters were evaluated statistically. Results: The mean age of the patients was ≥79 years. The mean duration of postoperative catheterization ranged between 2 (d) (ThuLEP, thulium laser enucleation of the prostate) and 4.4 days (TURP, transurethral resection of the prostate). Complication rates ranged between 6% (HoLAP, holmium laser ablation of the prostate) and 34% (PVP, photoselective vaporization of the prostate); the maximum rate of severe complications was 4% (TURP). The mean postoperative maximal urinary flow (Qmax) in mL/sec. ranged between 12.9 mL/sec. (HoLAP) and 19.8 mL/sec (Hol-TUIP, holmium laser transurethral incision of the prostate). The mean quality of life (QoL) score fell from 4.7 ± 0.9 to 1.8 ± 0.7 (HoLEP), from 4.1 ± 0.4 to 1.9 ± 0.8 (PVP), from 5.1 ± 0.2 to 2.1 ± 0.2 (TURP), and from 4 to 1 (ThuVEP, thulium laser vapoenucleation of the prostate). Pearson’s correlation coefficient (r) revealed a positive linear correlation between age and inferior functional outcome (higher postoperative International Prostate Symptom Score (IPSS) [r = 0.4175]), higher overall complication rates (r = 0.5432), and blood transfusions (r = 0.4474) across all surgical techniques. Conclusions: This meta-analysis provides the summary estimates for perioperative and postoperative functional outcome and safety of endoscopic treatment options for BPO in patients ≥ 75 years of age. Of particular importance is that all surgical techniques significantly improve the postoperative quality of life of patients in this age group compared to their preoperative quality of life.

17 January 2023 in PLOS ONE
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MDMartin Drerup
Martin Drerup
MÖMehmet Özsoy
Mehmet Özsoy
CWClemens Wehrberger
Clemens Wehrberger
MLMatthias Lenz
Matthias Lenz
CRChristian Ramesmayer
Christian Ramesmayer
SSStephan Seklehner
Stephan Seklehner
Aim: To assess contemporary in-hospital management of octogenarians and nonagenarians with ureteral calculi. Materials and methods: Review of patients aged ≥80 years hospitalized due to ureteral calculi. Data was extracted from eight Austrian centers of urology. Stone and patient related data were recorded. Treatment patterns in acute and elective settings were assessed. Results: A total of 759 patients hospitalized with ureteral calculi were analyzed. Out of them, 643 were octogenarians (80-89years) and 116 nonagenarians (90–99 years). In an acute setting, simple de-obstruction with urinary diversions outnumbered active stone treatments like URS and SWL (62.6% vs. 26.9% vs. 10.5%). Decision making whether patients underwent active stone treatment was driven by stone location (OR = 0.28, p0.05). In elective settings, 81.5% of procedures were active stone treatments–mainly URS (76.9%), while DJ stent or nephrostomy replacements were noted in 14.2% and 4.3%. Octogenarians (OR = 14, p<0.0001) and patients capable of walking (OR = 4.51, p = 0.01) had significantly higher odds of receiving active stone. Stone free rates and complications rates with URS were similar between octogenarians and nonagenarians (p = 0.98 and p = 0.58). Conclusion: In acute settings, age and extend of mobility were not found to be independent predictors for active stone treatment. In elective settings, after having received urinary diversions, reduced mobility and nonagenarians were less likely to undergo stone removal treatments. Safety and efficacy of URS seems to be similar in octogenarians and nonagenarians.

13 August 2024 in Diagnostics
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Journal Article
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SDSusanne Deininger
Susanne Deininger
ONOlaf Nairz
Olaf Nairz
ADAnna Dieplinger
Anna Dieplinger
CDChristian Deininger
Christian Deininger
Lukas LusuardiLukas Lusuardi
Lukas Lusuardi
PTPeter Törzsök
Peter Törzsök
Background: To retrospectively investigate scatter radiation (SCR) exposure among staff in the endourology operating theatre. Methods: During surgeries under fluoroscopic guidance, five professional groups (urological surgeon [US], surgical nurse [SN], assistant surgical nurse [ASN], anaesthetist [A], and anaesthesia care [AC]) wore real-time dosimeters (Philips DoseAware System) on their head and chest over lead aprons between July 2023 and February 2024. The SCR data were analysed and correlated with procedural and patient factors. Results: In total, 249 procedures were performed, including 86 retrograde intrarenal surgeries and 10 percutaneous nephrolithotomies. Median SCR exposure was 38.81, 17.20, 7.71, 11.58, 0.63, 0.23, 0.12, and 0.15 Microsievert (µSv) for US chest (USC), US head (USH), SN chest (SNC), SN head (SNH), A chest (AC), AC chest (ACC), ASN chest (ASNC), and ASN head (ASNH), respectively. There was a significant correlation between DAP and SCR doses detected by USC, USH, SNC, SNH, AC, and ACC dosimeters (p < 0.05). The median chest-to-eye conversion factor (CECF) was 2.11 for the US and 0.71 for the SN. Conclusions: This study, using real-time dosimetry, is among the first to assess staff occupational SCR exposure in endourology. It highlights a substantial SCR exposure, indicating an occupational health hazard that warrants further investigation.

15 November 2023 in Journal of Clinical Medicine
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Journal Article
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PTPeter Törzsök
Peter Törzsök
DODavid Oswald
David Oswald
CSChristopher Steiner
Christopher Steiner
MAMichael Abenhardt
Michael Abenhardt
CRChristian Ramesmayer
Christian Ramesmayer
SDSusanne Deininger
Susanne Deininger
Background: Our aim was to evaluate the effect of COVID-19 infection on male fertility and sexual function. Methods: Thirty-one patients were investigated over a mean follow-up of 90 days (22–527) after a COVID-19 infection. Erectile dysfunction (ED), blood tests for sexual hormones, semen analysis including analysis of oxidative stress (OS), as well as COVID-19 antibody titer and the nasal COVID-19 PCR test were evaluated pre- and post-infection. Results: Five patients reported a mild de novo ED (16.13%). One patient had a de novo positive mixed antiglobulin reaction test after the infection. We found no significant difference between pre-COVID-19 and post-COVID-19 spermiogram parameters (p = 0.815). OS showed no significant association with COVID-19 infection, but with pathological spermiogram categories, sperm concentration, total sperm count, testis volume, FSH and testosterone. Conclusion: COVID-19 infection does not appear to affect sperm quality and OS negatively in the intermediate term. Further investigations will be needed to assess the potential long-term effects of the infection and vaccination on male sexual function and fertility.