Off-clamp Robot-assisted Partial Nephrectomy Research Articles

On-clamp vs off-clamp robot-assisted partial nephrectomy for achieving modified trifecta: inverse probability of treatment weighting analysis from a high-volume tertiary robotic center.

On-clamp partial nephrectomy for the surgical treatment of renal masses poses the risk of ischemia and greater post-operative renal function loss. Conversely, the off-clamp technique might enhance renal function preservation by avoiding any ischemia time. Nevertheless, the debate persists regarding the efficacy of the on- versus off-clamp partial nephrectomy in achieving better surgical, functional, and oncological outcomes. We retrospectively assessed the data from patients undergoing Robot-Assisted Partial Nephrectomy (RAPN) from 2016 and 2023 in a tertiary robotic center. Inverse probability of treatment weighting (IPTW) was used to account for selection bias in treatment allocation. The main objective of the study was assessing the achievement rates of a modified trifecta within the two groups. Multivariable logistic regression analysis (MLRA) was employed to assess the predictors of trifecta achievement. 532 patients were included in the analysis, of whom 74.1% vs. 25.9% underwent on- and off-clamp, respectively. Balancing the two groups for the main predictors of on-clamp surgery, there were no significant differences between on- and off-clamp in terms of estimated blood loss, transfusion rate, intra- and post-operative complications, positive surgical margins, and post-operative mean reduction of eGFR. Finally, no differences were found in the rate of "trifecta" achievement between on-clamp and off-clamp RAPN (24.6% vs. 21%, p = 0.82). At MLRA, off-clamp technique was not a predictor of trifecta achievement compared to the on-clamp technique (off-clamp vs. on-clamp, aOR 1.24, 95% CIs [0.65-2.36], p = 0.58). Our study revealed that clamping technique does not imply clinically relevant differences in reaching trifecta outcomes.

Renal Function Preservation in Purely Off-Clamp Sutureless Robotic Partial Nephrectomy: Initial Experience and Technique.

The aim of our study is to evaluate the effectiveness and safety of a sutureless off-clamp robot-assisted partial nephrectomy (sl-oc RAPN), particularly its impact on renal function. A multicenter study was conducted from April 2021 to June 2022. Patients diagnosed with a renal mass of >2 cm and a PADUA score of ≤6 consecutively underwent an sl-oc RAPN procedure. Tumor features, patients characteristics, and intraoperative outcomes were assessed. An evaluation of renal function was performed preoperatively, and again at 1 and 3 months after surgery by measuring the creatinine and blood urea nitrogen levels. The renal function of the two separate kidneys was assessed by a sequential renal scintigraphy performed before and at least 30 days after surgery. A total of 21 patients underwent an sl-oc RAPN. The median age was 64 years (IQR 52/70), the median tumor diameter was 40 mm (IQR 29/45), and the median PADUA score was 4 (3.5/5). The intraoperative outcomes included operative time (OT), 90 (IQR 74/100) min; estimated blood loss (EBL), 150 (IQR 50/300) mL; and perioperative complications, CD > 3 1(5%); only two patients presented positive surgical margins in their final histology (2/21, 10%). Compared to the preoperative value, a decrease in renal function was highlighted with a statistically significant median decrease of 10 mL/min (p < 0.01). The renal scintigraphy showed an overall decrease in renal function compared to the preoperative value, with a range in the operated kidney that varied from 0 to 15 mL/s and from 0% to 40%, with a median value of 4 mL/s and 12%. sl-oc RAPN is a safe procedure, with a minimal impact on kidney function alteration. This technique has proven effective in preserving renal function and maintaining optimal oncological outcomes with limited complications.

Comparison of Perioperative, Functional, and Oncologic Outcomes of Open vs. Robot-Assisted Off-Clamp Partial Nephrectomy: A Propensity Scored Match Analysis.

Off-clamp partial nephrectomy represents one of the latest developments in nephron-sparing surgery, with the goal of preserving renal function and reducing ischemia time. The aim of this study was to evaluate and compare the functional, oncologic, and perioperative outcomes between off-clamp robot-assisted partial nephrectomy (off-C RAPN) and off-clamp open partial nephrectomy (off-C OPN) through a propensity score-matched (PSM) analysis. A 1:1 PSM analysis was used to balance variables potentially affecting postoperative outcomes. To report surgical quality, 1 year trifecta was used. Univariable Cox regression analysis was performed to identify predictors of trifecta achievement. The Kaplan-Meier method was used to compare cancer-specific survival (CSS), overall survival (OS), disease-free survival (DFS), and metastasis-free survival (MFS) probabilities between groups. Overall, 542 patients were included. After PSM analysis, two homogeneous cohorts of 147 patients were obtained. The off-C RAPN cohort experienced shorter length of stay (LoS) (3.4 days vs. 5.4 days; p < 0.001), increased likelihoods of achieving 1 year trifecta (89.8% vs. 80.3%; p = 0.03), lower postoperative Clavien-Dindo ≤ 2 complications (1.3% vs. 18.3%, p < 0.001), and lower postoperative transfusion rates (3.4% vs. 12.2%, p = 0.008). At univariable analysis, the surgical approach (off-C RAPN vs. off-C OPN, OR 2.22, 95% CI 1.09-4.46, p = 0.02) was the only predictor of 1 year trifecta achievement. At Kaplan-Meier analysis, no differences were observed between the two groups in terms of OS (log-rank p = 0.451), CSS (log-rank p = 0.476), DFS (log-rank p = 0.678), and MFS (log-rank p = 0.226). Comparing RAPN and OPN in a purely off-clamp scenario, the minimally invasive approach proved to be a feasible and safe surgical approach, with a significantly lower LoS and minor rate of postoperative complications and transfusions as a result of improved surgical quality expressed by higher 1 year trifecta achievement.

Skill Transfer from Laparoscopic Partial Nephrectomy to the Hugo™ RAS System: A Novel Proficiency Score to Assess Surgical Quality during the Learning Curve.

Background/Objectives: The absence of validated tools to assess the skill transfer from laparoscopy to robotic surgery remains an unsolved issue in the context of robot-assisted partial nephrectomy (RAPN). We aimed to describe and validate a novel proficiency score to critically evaluate the surgical quality of RAPN with the Hugo™ RAS System (Medtronic, Minneapolis, MN, USA). Methods: Between October 2022 and September 2023, 27 consecutive patients underwent off-clamp RAPN for localized renal tumors at our institution. To analyze the learning curve (LC), the cohort was chronologically divided into two phases of 6 months each. Proficiency was defined as the achievement of trifecta while maintaining a comparable intraoperative time in the interquartile range of laparoscopic partial nephrectomy performed by the same surgeon. A logistic binary regression model was built to identify predictors of proficiency achievement. Results: A proficiency score was achieved in 14 patients (74.1%). At univariable analysis, number of consecutive procedures > 12 (OR 13.7; 95%CI 2.05-21.1, p = 0.007), pathological tumor size (OR 0.92; 95%CI 0.89-0.99, p = 0.04) and essential blood hypertension (OR 0.16; 95%CI 0.03-0.82, p = 0.02) were found to be predictors of proficiency score. At multivariable analysis, after adjusting for potential confounding factors, number of consecutive procedures > 12 (OR 8.1; 95%CI 1.44-14.6, p = 0.03) was the only independent predictor of proficiency score achievement. Conclusions: Our results showed that the skills of an experienced laparoscopic surgeon are transferrable to the novel Hugo™ RAS System in the context of nephron-sparing surgery. Improved surgical quality may be expected after completing the first 12 consecutive procedures.

Robot-assisted partial nephrectomy using the novel Hugo™ RAS system: Feasibility, setting and perioperative outcomes of the first off-clamp series.

Hugo Robot-Assisted Surgery (RAS) System has been conceived with enhanced modularity but its role for nephron-sparing surgery setting still remains poorly explored. We aimed to describe our experience in robot-assisted partial nephrectomy (RAPN) with a three-arms setting for the first off-clamp series using the new Hugo RAS System. Patients were placed on an extended flank position at the margin of the surgical bed with a slightly flexion (45°). The first 11 mm robotic trocar (camera port) was placed along the pararectal line 14 ± 2 cm far from the umbilicus. The pneumoperitoneum was then induced through the AirSeal system (SurgiQuest, Milford, Connecticut, USA©). Two more 8 mm operative robotic ports were placed under direct vision, either 8 ± 1 cm far from optic's port. Two 12 mm laparoscopic ports for bed-assistant were placed between robotic ports. Monopolar curved shears, fenestrated grasper, and large needle driver were used in a three-instruments configuration. Off-clamp RAPN was successfully performed in seven patients with cT1 renal masses using a trans-peritoneal route. Median port placement and docking time was 6 min (IQR, 4-8 min). Hemostasis was achieved through renorraphy using a single transfix stitch with sliding clips technique. There was no need for additional ports placement. No intraoperative complications occurred, no clashing of robotic instruments or between the robotic arms was observed. No technical failures of the system occurred. Median console time was 83 min (IQR, 68-115 min). Median estimated blood loss were 200 ml (IQR, 50-400 ml). All patients were discharged between post-operative day 2 and 3, without the need of hospital readmission. No complications were recorded within the first 30 post-operative days. We performed the first series of off-clamp RAPN using the novel HUGO RAS System. This novel robotic platform showed an easy-friendly docking system, providing excellent perioperative outcomes with a simple three-arms configuration.

How many cases are required to achieving early proficiency in purely off-clamp robot-assisted partial nephrectomy?

Off-clamp robot-assisted partial nephrectomy (Offc-RAPN) is a technically challenging procedure that can effectively avoid renal ischemia owing to the absence of hilar vessel preparation and clamping. However, data on the learning curve (LC) for this technique are limited. The purpose of this study was to assess the LC of Offc-RAPN and compare the perioperative outcomes between different learning phases. This retrospective study included 50 consecutive patients who underwent purely Offc-RAPN between January 2022 and April 2023. Multidimensional cumulative sum (CUSUM) analysis method was used to assess LC. Spearman's correlation and LOWESS analysis were performed to analyze the continuous variables of perioperative outcomes. Baseline characteristics and perioperative outcomes were compared using χ2-test, t-test and U-test. CUSUM analysis identified two LC phases: phase I (the first 24 cases) and phase II (the subsequent 26 cases). Phase II showed significant reductions in mean operative time (133.5 vs. 115.31 min; p = 0.04), mean console time (103.21 vs. 81.27 min; p = 0.01), and mean postoperative length of stay (5.33 vs. 4.30 days; p = 0.04) compared to phase I. However, no significant differences were observed in other perioperative outcomes or baseline characteristics between the two LC phases. Offc-RAPN performed by a surgeon with experience in laparoscopic and robotic surgeries achieved early proficiency in 24 cases. Moreover, Offc-RAPN alone is safe and feasible even in the initial phase of the LC for an experienced surgeon.

Off-clamp vs on-clamp robot-assisted partial nephrectomy: a systematic review and meta-analysis.

To compare intra- and postoperative outcomes between off-clamp and on-clamp robot-assisted partial nephrectomy (RAPN), using data from randomised controlled trials (RCTs) or covariate-matched studies (propensity score-matched or matched-pair analysis). A Preferred Reporting Items for Systematic Reviews and Meta-Analyses-compliant literature review was conducted on PubMed, EMBASE, Scopus and CENTRAL for relevant studies comparing off-clamp to on-clamp RAPN. Primary outcomes were estimated blood loss, postoperative percentage decrease in estimated glomerular filtration rate (eGFR), and margin positive rate. Secondary outcomes were operative time, postoperative eGFR, length of stay, all postoperative complications, major complications, and need for transfusion. Random-effects meta-analyses were performed to generate mean differences (MDs) or odds ratios (ORs). A total of 10 studies (2307 patients) were shortlisted for analysis. There was no significant difference in estimated operative blood loss between off-clamp and on-clamp RAPN (MD 21.9 mL, 95% confidence interval [CI] -0.9 to 44.7 mL; P = 0.06, I2 = 58%). Off-clamp RAPN yielded a smaller postoperative eGFR deterioration (MD 3.10%, 95% CI 1.05-5.16%; P = 0.008, I2 = 13%) and lower odds of margin positivity (OR 0.62, 95% CI 0.40-0.94; P = 0.03, I2 = 0%). No significant differences were found for all secondary outcomes. Off-clamp and on-clamp RAPN are similarly effective approaches for selected renal masses. Within the classic trifecta of PN outcomes, off-clamp RAPN yields similar rates of perioperative complications and may possibly offer better preservation of renal function and reduced margin-positive rates.

Indocyanine green-marked fluorescence-guided off-clamp versus intraoperative ultrasound-guided on-clamp robotic partial nephrectomy: Outcomes on surgical procedure.

To compare surgical and functional outcomes between off-clamp robot-assisted partial nephrectomy with indocyanine-green tumour marking through preliminary superselective embolization and on-clamp robot-assisted partial nephrectomy with intraoperative ultrasound identification of the renal mass. One hundred and forty patients with a single renal mass underwent indocyanine-green fluorescence-guided off-clamp robot-assisted partial nephrectomy with preoperative superselective embolization (Group A, 70 patients) versus intraoperative ultrasound-guided on-clamp robot-assisted partial nephrectomy without embolization (Group B, 70 patients). We assessed operative time, intraoperative blood loss, complications, length of stay, renal function, need for ancillary procedures and blood transfusions. Mean tumour size was 24 versus 25 mm in Group A versus Group B (p= 0.19). Mean operative time was 86.5 versus 121.8 min (p= 0.02), mean blood loss was 72.8 versus 214.2 mL (p= 0.02), and mean haemoglobin drop on postoperative day 1 was 1.1 versus 2.6 g/dL (p= 0.04) in Group A versus Group B. One-month creatinine, hospital stay and enucleated tumour volume were comparable. Ten postoperative complications occurred in Group A (13.3%) and 11 in Group B (15.3%). Following superselective embolization, no patients required blood transfusions versus two patients in Group B. Postoperative selective renal embolization was needed in one case per group. Preoperative superselective embolization of a renal mass with indocyanine-green before off-clamp robot-assisted partial nephrectomy significantly reduces operative time and intraoperative blood loss compared to on-clamp intraoperative ultrasound-guided robot-assisted partial nephrectomy. A longer follow-up is needed to establish the effect on renal function.

Robot-Assisted Renal Surgery with the New Hugo Ras System: Trocar Placement and Docking Settings.

The current literature relating to the novel HugoTM RAS System lacks consistent data concerning the bedside features of robot-assisted partial nephrectomy (RAPN). To describe the trocar placement and docking settings for RAPN with a three-arm configuration to streamline the procedure with HugoTM RAS, between October 2022 and April 2023, twenty-five consecutive off-clamp RAPNs for renal tumors with the HugoTM RAS System were performed. We conceived a trouble-free three-arm setting to ease and standardize RAPN trocar placement and docking settings with HugoTM RAS. Perioperative data were collected. Post-operative complications were reported according to the Clavien-Dindo classification. The eGFR was calculated according to the CKD-EPI formula. Continuous variables were presented as the median and IQR, while frequencies were reported as categorical variables. Off-clamp RAPNs were successfully performed in all cases without the need for conversion or additional port placement. The median age and BMI were 69 years (IQR, 60-73) and 27.3 kg/m2 (IQR, 25.7-28.1), respectively. The median tumor size and R.E.N.A.L. score were 32.5 mm (IQR, 26-43.7) and 6 (IQR, 5-7), respectively. Two patients were affected by cT2 renal tumors. The median docking and console time were 5 (IQR, 5-6) and 90 min (IQR, 68-135.75 min), respectively, with slightly progressive improvements in the docking time achieved. No intraoperative complications occurred alongside clashes between instruments or with the bed assistant. In experienced hands, this simplified three-instrument configuration of the HugoTM RAS System for off-clamp RAPN resulted in feasible and safe practice, providing patient-tailored trocar placement and docking with non-inferior peri-perioperative outcomes to other robotic platforms.

PE069 - Off-clamp robot-assisted partial nephrectomy using the new Hugo Ras System for T1 renal masses: oncological and functional outcomes at short-term follow-up

PE069 - Off-clamp robot-assisted partial nephrectomy using the new Hugo Ras System for T1 renal masses: oncological and functional outcomes at short-term follow-up

PE070 - Off-clamp robot-assisted partial nephrectomy using the new Hugo RAS System: Trocar placement and docking setting

PE070 - Off-clamp robot-assisted partial nephrectomy using the new Hugo RAS System: Trocar placement and docking setting

Off-clamp robot-assisted partial nephrectomy for renal hilar tumors.

Off-clamp robot-assisted partial nephrectomy for renal hilar tumors.

Hugo RAS Robot-Assisted Partial Nephrectomy for High-Nephrometry Score Complex Renal Mass: Case Report and Surgical Technique

Hugo™ robot-assisted surgery (RAS) system has been conceived with enhanced modularity cart features and an independent arm-cart docking, nonetheless its role for nephron-sparing surgery has not been defined yet. From October 2022, 15, consecutive patients underwent off-clamp robot-assisted partial nephrectomy (RAPN) for T1 tumors. We are a solely off-clamp partial nephrectomy (PN) center, consequently the T2 RAPN was carried out clampless. Furthermore, we acquired experience and familiarity with Hugo RAS, thanks to an initial series of 15 robotic radical prostatectomies. We report the first RAPN with the new Hugo RAS system for a large highly complex right posterior hilar renal mass (8 cm, cT2) in a 63-year-old man with a BMI of 35.3 kg/m2. The choice to perform RAPN for high-nephrometry score renal mass without hilar clamping was because of the technique we usually perform at our center as we have never done on-clamp procedures. The purpose was to assess the feasibility and the modularity of Hugo RAS independent arm-cart docking even in complex posterior hilar renal tumor, and to explore its role in the setting of off-clamp RAPN. Preoperative hemoglobin, serum creatinine, and estimated glomerular filtration rate were 15.5 g/dL, 0.92 mg/dL, and 115.1 mL/min per 1.73 m2, respectively. The patient was placed on an extended flank position. A modified three-arm configuration was used by a conventional transperitoneal route. Port placement and docking time required 5 minutes. Complete kidney mobilization, identification of arterial branches feeding the tumor, and straightforward approach to the renal mass represented standard key steps of our off-clamp RAPN technique. Tumor enucleation was achieved developing an anatomical cleavage plane. Intraoperative bleeding was controlled with double suction, a slight increase of the pneumoperitoneum to 20 mm Hg, monopolar energy, and renorraphy with a 2/0 Monocryl single-running suture using a sliding-clip technique. No intraoperative complications occurred. No additional port placement was necessary. Console time was 110 minutes, estimated blood loss were ~500 mL. Patient was discharged on postoperative day 3 after bladder catheter and abdominal drain removal, with hemoglobin, serum creatinine, and eGFR of 11.8 g/dL (∆Hb 3.7 g/dL), 0.94 mg/dL, and 112.6 mL/min per 1.73 m2, respectively. Histologic evaluation revealed a chromophobe renal cell carcinoma. Considering the intra- and perioperative outcomes, the lack of complications, and the fast docking, this robotic platform seems to be an user-friendly technology. Currently, the small series considered as the granularity of data regarding the application of Hugo RAS in the RAPN setting hinder to assess that this novel platform is comparable with conventional robotic systems. Further studies with a larger cohort are needed to establish the noninferiority of this platform, but preliminary results seem encouraging. The authors declare no conflict of interest and any commercial associations during the past 3 years. No funding was received for this article. Informed Consent Statement: Informed consent was obtained from all subjects involved in the study. Authors have received and archived patient consent for video recording/publication in advance of video recording of procedure. Institutional Review Board Statement: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Source of Work: This study was carried out at Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy. Runtime of video: 4 mins 45 secs

Off-clamp Versus On-clamp Robot-assisted Partial Nephrectomy: A Propensity-matched Analysis

BackgroundPartial nephrectomy is the preferred treatment option for the management of small renal masses. On-clamp partial nephrectomy is associated with a risk of ischemia and a greater loss of postoperative renal function, while the off-clamp procedure decreases the duration of renal ischemia, leading to better renal function preservation. However, the efficacy of the off- versus on-clamp partial nephrectomy for renal function preservation remains debatable. ObjectiveTo compare perioperative and functional outcomes following off- and on-clamp robot-assisted partial nephrectomy (RAPN). Design, setting, and participantsThis study used the prospective multinational collaborative Vattikuti Collective Quality Initiative (VCQI) database for RAPN. Outcome measurements and statistical analysisThe primary objective of this study was the comparison of perioperative and functional outcomes between patients who underwent off- and on-clamp RAPN. Propensity scores were calculated for age, sex, body mass index (BMI), renal nephrometry score (RNS) and preoperative estimated glomerular filtration rate (eGFR). Results and limitationsOf the 2114 patients, 210 had undergone off-clamp RAPN and others on-clamp procedure. Propensity matching was possible for 205 patients in a 1:1 ratio. After matching, the two groups were comparable for age, sex, BMI, tumor size, multifocality, tumor side, face of tumor, RNS, polar location of the tumor, surgical access, and preoperative hemoglobin, creatinine, and eGFR. There was no difference between the two groups for intraoperative (4.8% vs 5.3%, p = 0.823) and postoperative (11.2% vs 8.3%, p = 0.318) complications. Need for blood transfusion (2.9% vs 0, p = 0.030) and conversion to radical nephrectomy (10.2% vs 1%, p < 0.001) were significantly higher in the off-clamp group. At the last follow-up, there was no difference between the two groups for creatinine and eGFR. The mean fall in eGFR at the last follow-up compared with that at baseline was equivalent between the two groups (–16.0 vs –17.3 ml/min, p = 0.985). ConclusionsOff-clamp RAPN does not result in better renal functional preservation. Alternatively, it may be associated with increased rates of conversion to radical nephrectomy and need for blood transfusion. Patient summaryWith this multicentric study, we noted that performing robotic partial nephrectomy without clamping the blood supply to the kidney is not associated with better preservation of renal function. However, off-clamp partial nephrectomy is associated with increased rates of conversion to radical nephrectomy and blood transfusion.

The role of warm ischemia time on functional outcomes after robotic partial nephrectomy: a radionuclide renal scan study from the clock randomized trial

PurposeTo evaluate the relationship between warm ischemia time (WIT) duration and renal function after robot-assisted partial nephrectomy (RAPN).MethodsThe CLOCK trial is a phase 3 randomized controlled trial comparing on- vs off-clamp RAPN. All patients underwent pre- and postoperative renal scintigraphy. Six-month absolute variation of eGFR (AV-GFR), rate of relative variation in eGFR over 25% (RV-GFR > 25), absolute variation of split renal function (SRF) at scintigraphy (AV-SRF).The relationships WIT/outcomes were assessed by correlation graphs and then modeled by uni- and multivariable regression.Results324 patients were included (206 on-clamp, 118 off-clamp RAPN). Correlation graphs showed a threshold on WIT equal to 10 min. The differences in outcome measures between cases with WIT < vs ≥ 10 min were: AV-GFR − 3.7 vs − 7.5 ml/min (p < 0.001); AV-SRF − 1% vs − 3.6% (p < 0.001); RV-GFR > 25 9.3% vs 17.8% (p = 0.008). Multivariable models found that AV-GFR was related to WIT ≥ 10 min (regression coefficient [RC] − 0.52, p = 0.019), age (RC − 0.35, p = 0.001) and baseline eGFR (RC − 0.30, p < 0.001); RV-GFR > 25 to WIT ≥ 10 min (odds ratio [OR] 1.11, p = 0.007) and acute kidney injury defined as > 50% increase in serum creatinine (OR 19.7, p = 0.009); AV-SRF to WIT ≥ 10 min (RC − 0.30, p = 0.018), baseline SRF (RC − 0.76, p < 0.001) and RENAL score (RC − 0.60. p = 0.028).The main limitation was that the CLOCK trial was designed on a different endpoint and therefore the present analysis could be underpowered.ConclusionsUp to 10 min WIT had no consequences on functional outcomes. Above the 10-min threshold, a statistically significant, but clinically negligible impact was found.

MP47-05 SUTURELESS OFF-CLAMP ROBOT-ASSISTED PARTIAL NEPHRECTOMY: INDICATION, FEASIBILITY AND FUNCTIONAL OUTCOMES

You have accessJournal of UrologyCME1 Apr 2023MP47-05 SUTURELESS OFF-CLAMP ROBOT-ASSISTED PARTIAL NEPHRECTOMY: INDICATION, FEASIBILITY AND FUNCTIONAL OUTCOMES Riccardo Mastroianni, Gabriele Tuderti, Umberto Anceschi, Alfredo Maria Bove, Aldo Brassetti, Manuela Costantini, Simone D'annunzio, Mariaconsiglia Ferriero, Leonardo Misuraca, Andrea Iannuzzi, Alberto Ragusa, Rocco Papalia, Salvatore Guaglianone, and Giuseppe Simone Riccardo MastroianniRiccardo Mastroianni More articles by this author , Gabriele TudertiGabriele Tuderti More articles by this author , Umberto AnceschiUmberto Anceschi More articles by this author , Alfredo Maria BoveAlfredo Maria Bove More articles by this author , Aldo BrassettiAldo Brassetti More articles by this author , Manuela CostantiniManuela Costantini More articles by this author , Simone D'annunzioSimone D'annunzio More articles by this author , Mariaconsiglia FerrieroMariaconsiglia Ferriero More articles by this author , Leonardo MisuracaLeonardo Misuraca More articles by this author , Andrea IannuzziAndrea Iannuzzi More articles by this author , Alberto RagusaAlberto Ragusa More articles by this author , Rocco PapaliaRocco Papalia More articles by this author , Salvatore GuaglianoneSalvatore Guaglianone More articles by this author , and Giuseppe SimoneGiuseppe Simone More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003293.05AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Minimizing renal function loss during robot-assisted partial nephrectomy (RAPN) is a primary surgical outcome. There are few reports about sutureless RAPN and this procedure has intrinsic selection bias, being renorraphy a mandatory step to manage major bleeding sources and unintended urinary tract violation. The aim of this study was to describe predictors of performing renorraphy, and to compare perioperative and functional outcomes between sutureless and conventional renorraphy RAPN. METHODS: Our single center IRB approved renal cancer database was queried for “RAPN” and “renorraphy””. After a standardization process, all consecutive patients treated between Jan 2020 and May 2022 underwent off-clamp RAPN with a sutureless intent. Renal stump coagulation was used to control bleeding sources after RAPN. Intraoperative evidences of urinary tract violation was the only indication to perform renorraphy. Baseline and postoperative outcomes were collected. Continuous and categorical variables were compared using Mann-Whitney and Chi-Square tests. Logistic regression analysis was performed to identify predictors of renorraphy. Kaplan-Meier (KM) analysis and the log-rank test were performed to compare probabilities of developing newly onset chronic kidney disease (CKD) stage≥3 between cohorts. RESULTS: Out of 269 patients included, sutureless approach was successully completed in 246 patients. Both cohorts were homogeneous for baseline features except for PADUA score (p=0.028). No differences occurred postoperatively (Table 1). On multivariable analysis, nearness to collecting system ≤4mm was the only independent predictor of need for renorraphy (p=0.008 - Table 2). Overall, 108 patients had a renal tumor nearness ≤4mm to collecting system and sutureless intent failure probability was 16%. At KM analysis, performing renorraphy did not impact on probabilities of developning CKD stage ≥3 (2yrs: sutureless: 16.3%±2.9 vs renorraphy: 19.0%±10.5; p=0.71). CONCLUSIONS: Nearness to urinary collecting system predicts probability of performing renorraphy, which had negligible impact on perioperative and early functional outcomes. Safety, feasibility and functional outcomes of sutureless RAPN were confirmed, even if larger cohorts and randomized controlled trials are needed to obtain stronger evidences. Source of Funding: None © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue Supplement 4April 2023Page: e644 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Riccardo Mastroianni More articles by this author Gabriele Tuderti More articles by this author Umberto Anceschi More articles by this author Alfredo Maria Bove More articles by this author Aldo Brassetti More articles by this author Manuela Costantini More articles by this author Simone D'annunzio More articles by this author Mariaconsiglia Ferriero More articles by this author Leonardo Misuraca More articles by this author Andrea Iannuzzi More articles by this author Alberto Ragusa More articles by this author Rocco Papalia More articles by this author Salvatore Guaglianone More articles by this author Giuseppe Simone More articles by this author Expand All Advertisement PDF downloadLoading ...

Unveil the interplay between baseline renal function, warm ischemia time and tumor complexity when assessing renal functional outcomes of on- vs. off-clamp robot-assisted partial nephrectomy

Unveil the interplay between baseline renal function, warm ischemia time and tumor complexity when assessing renal functional outcomes of on- vs. off-clamp robot-assisted partial nephrectomy

Outcomes of on-clamp vs. off-clamp robot-assisted partial nephrectomy for large highly complex renal tumors: A multicenter study

Outcomes of on-clamp vs. off-clamp robot-assisted partial nephrectomy for large highly complex renal tumors: A multicenter study

Sutureless Purely Off-Clamp Robot-Assisted Partial Nephrectomy: Avoiding Renorrhaphy Does Not Jeopardize Surgical and Functional Outcomes.

To compare outcomes of sutureless (SL) vs. renorrhaphy (RR) off-clamp robotic partial nephrectomy (ocRPN), we retrospectively analyzed procedures performed at our center, from January 2017 to April 2021, for cT1-2N0M0 renal masses. All the patients with a minimum follow-up < 1 month were excluded from the analysis. The trifecta rate defined surgical quality. Any worsening from chronic kidney disease (CKD) I-II to ≧ IIIa (from IIIa to ≧ IIIb, and from IIIb to ≧ IV) was considered as significant stage migration (sCKDsm). A 1:1 propensity score-matched (PSM) analysis minimized baseline imbalances between SL and RR cohorts in terms of age, gender, ASA score, baseline estimated glomerular filtration rate (eGFR), tumor size, and RENAL score. Logistic regression analyses identified predictors of trifecta achievement. Kaplan-Meier (KM) analysis assessed the impact of RR on significant chronic kidney disease sCKDsm-free survival (SMFS), while Cox regression analyses identified its predictors. Overall, 531 patients were included, with a median tumor size of 3.5 cm (IQR: 2.7-5); 70 (13%) presented with a cT2 mass. An SL approach was pursued in 180 cases, but 10 needed conversion to RR. After PSM analysis, patients receiving SL showed a higher trifecta rate (94% vs. 84%; p = 0.007). SMFS probabilities were comparable at KM analysis (log-rank = 0.69). Age (OR: 0.97; 95%CI: 0.95-0.99; p = 0.01), a RENAL score ≧ 10 (OR: 0.29; 95%CI: 0.15-0.57; p < 0.001), and RR (OR: 0.34; 95%CI: 0.17-0.67; p = 0.002) were independent predictors of trifecta achievement. Age (OR: 1.04; 95%CI: 1.003-1.07; p = 0.03) and baseline eGFR (OR: 0.99; 95%CI: 0.97-0.99; p = 0.05) independently predicted sCKDsm. Compared to RR, our experience seems to show that the SL approach significantly increased the probabilities of achieving the trifecta in the observed group of cases.

Off-clamp robotic-assisted partial nephrectomy: surgical experience from a single centre.

Robot-assisted partial nephrectomy (RAPN) is a minimally invasive treatment for localized renal tumours, which can sometimes result in extended warm ischaemic time and serious complications. This study reports on surgical outcomes including feasibility, positive margins, and complications during and after surgery. From January 2011 to November 2022, a single centre performed off-clamp sutureless RAPN on 287 patients. The study recorded preoperative patient characteristics, estimated glomerular filtration rate, and tumour features according to the preoperative aspects and dimensions used for an anatomical (PADUA) classification, and utilized the RENAL nephrometry scoring system. Intraoperative details and complications were documented. Postoperative complications within 30 days were classified according to the Clavien-Dindo system. Follow-up appointments were scheduled at 1, 3, and 6 months in the first year, followed by subsequent appointments every 6 months, and then annually. The study included 145 males and 142 females, with a mean age of 58.9 years and a mean body mass index of 26.7 kg/m2. The mean PADUA score was 8.3, the average console time was 83 minutes, and the estimated blood loss was 280 mL. The average hospital stay was 3 days, and no intraoperative complications were observed. However, 4 patients (1.4%) experienced post-operative haemorrhage that required laparotomy (Clavien-Dindo stage IIIB), and 4 patients (1.4%) had positive surgical margins. Off-clamp selective arterial clamping during minimally invasive partial nephrectomy is a safe and feasible approach for small renal tumours. Further randomized prospective studies are required to confirm if RAPN without clamping offers any renal functional benefits and reduces perioperative bleeding complications.