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Objective To explore the application of three-dimensional intelligent qualitative and quantitative analysis system (IQQA) in the planning,simulation and implementation of precise surgery for bilateral renal tumors.Methods A retrospective analysis a total of 7 patients with bilateral kidney tumors in our center from June 2017 to August 2018 was performed.There were 5 males and 2 females,with an average age of (54.6 ± 6.0) years,ranging 47.0-63.0 years.The average BMI index was (23.4 ± 2.4) kg/m2,ranging 21.2-28.0 kg/m2.The average diameter of 14 renal tumors in 7 patients was (3.8 ± 1.1) cm,ranging 1.9-5.3 cm.The average R.E.N.A.L score was 6.6 ± 1.2,ranging 5.0-9.0.The tumor stage was T1N0M0.The mean preoperative hemoglobin,albumin,creatinine and GFR were (138.6 ± 17.0)g/L and (47.3 ± 2.5 g/L),(51.6 ± 19.1) μmol/Land (56.9 ± 6.7) ml/min,respectively.Before operation,the original data of CT were input into IQQA system.Then we reconstructed kidney,blood vessel,collecting system and tumors using system.And the structure of kidney,tumors and vessels was visualized directly.The systematic analysis of the operation is carried out at terminals vary from various angles,and the surgical resection simulation.The position,angle and curvature of the cut surface are adjusted according to the effect.The plan of partial nephrectomy is designed.The resection area,remaining area of kidney is calculated.In this way,we can construct individualized and accurate laparoscopic partial nephrectomy planning before operation.Last,we carried out the operation according to the designed plan.The laparoscopic standard partial nephrectomy was performed in 11 cases.The laparoscopic selective partial nephrectomy was performed in 2 cases.One underwent laparoscopic partial nephrectomy without obstruction.We achieved precise resection of tumors and rapid suture of wounds according to the preoperative planning of excision and suture.We collected of the surgical success rate,conversion to opening rate,operation time,warm ischemia time,intraoperative bleeding volume,complications and hospitalization after operation.The related laboratory indicators such as eGFR and creatinine were followed up for 3 months,and the prognostic indicators such as renal CT and pulmonary CT for 6 months after operation were evaluated and analyzed.Result 14 renal tumors were successfully reconstructed by IQQA in 7 patients.The operations were completed successfully without conversion to open surgery or radical nephrectomy.The average operative duration was (68.9 ± 9.2) minutes,ranging 50.0-80.0 minutes.The average renal artery occlusion duration was (20.7 ± 4.1) minutes,ranging 15.0-29.0 minutes.The average intraoperative bleeding volume was (70.7 ± 29.7) ml,ranging 30.0-120.0 ml.The average indwelling time of drainage tube was (5.5 s0.7) days,ranging 5.0-7.0 days.The average hospitalization time was (6.3 ± 0.5) days,ranging 6.0-7.0 days.There were no perioperative complications such as bleeding,urinary leakage,infection,incision dehiscence and pulmonary infection.Postoperative pathology revealed 13 clear cell renal carcinoma and 1 renal angiomyoma.No recurrence or metastasis was found in chest CT and lung CT after 6 months follow-up.The creatinine and GFR in 3 months after operation were (52.0 ± 15.2) μmol/L(36.0-72.0 μmol/L) and (56.7 ± 5.3) ml/min(46.7-66.3 ml/min).There was no significant difference of creatinine and GFR with the preoperative (P ＞ 0.05).The mean Hb and albumin levels in 3 months after operation were (120.9 ± 17.0) g/L(90.0-147.0 g/L) and (41.4 ± 2.6) g/L (38.0-46.0 g/L),which were significantly lower than those before operation (P ＜ 0.05).Conclusions The three-dimensional intelligent qualitative and quantitative analysis system (IQQA) can visualize the kidney,tumor and the vasculature of bilateral kidney tumors by preoperative three-dimensional reconstruction.The optimal surgical plan of partial nephrectomy can be designed by preoperative operation planning and computer terminal in order to enhance the safety of partial nephrectomy for bilateral kidney tumors and preserve the possibility of kidney,and protect the renal function to the greatest extent.To accurately predict the retention of renal function after operation,so that patients with bilateral renal tumors can get the greatest benefit in partial nephrectomy.
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Objective To investigate the clinical feasibility and effectiveness of 3-D printing (3DP) combined with 3-D laparoscopic nephron-sparing surgery (LNSS) for partial endogenous renal cell carcinoma.Methods A retrospective analysis was made of the clinical data of 79 patients with partial endogenous renal cell carcinoma who were admitted to our department from July 2015 to October 2018.There were 46 males and 33 females.Their average age was (50.9 ± 7.9) years old,ranged from 33 to 68 years old.Tumor stages were T1aN0M0 in 53 cases and T1bN0M0 in 26 cases.The preoperative serum creatinine ranged from 40 to 107 μmol/L,with an average of (72.4 ± 14.2) μmol/L.The preoperative GFR ranged from 19 to 54 ml/min,with an average of (40.2 ± 6.2) ml/min.Thirty-four patients underwent 2-D laparoscopic nephron-sparing surgery (2DLNSS) based on preoperative enhanced CT scans.Forty-five patients underwent 3-D printing (3DP) based on three-dimensional reconstruction of renal CT scans.Seventeen patients underwent 2-D laparoscopic nephron-sparing surgery guided by 3-D printing model(3DP-2DLNSS),and 28 patients underwent 3-D laparoscopic nephron-sparing surgery guided by 3-D printing (3DP-3DLNSS).Serum creatinine levels ranged from 42 to 122 μmol/L with an average of (86.3 ± 14.8) μmol/L,and creatinine levels ranged from 8 to 66 μmol/L with an average of (19.1 ± 14.1) μmol/L.Six months after operation,the GFR of the kidney was 9-36 ml/min with an average of (21.4 ± 6.4)ml/min,and the fluctuation range was 6-40 ml/min with an average of (19.2 ± 8.8) ml/min.There was no statistical difference in the incidence of complications and pathological types after operation.Results There was no statistical difference in general data of preoperative patients.In intraoperative and post-operative statistics,the time of exploring renal artery was shorter than that of 2DLNSS (33.7 ± 7.5) min in 3DP-2DLNSS (28.3 ± 8.2,P =0.015) min and 3DP-3DLNSS (27.8 ± 6.5,P =0.002) min.In tumor detection time,3 DP-2DLNSS was shorter than 2DLNSS group (41.2 ± 6.6 vs.46.5 ± 6.9 min,P =0.012),and 3 DP-3DLNSS was shorter than 3DP-2DLNSS (35.4 ± 7.3 vs.41.2 ± 6.6 min,P =0.009).In warm ischemia time,3DP-2DLNSS min was shorter than 2DLNSS (23.5 ±9.7 vs.33.9 ±7.5 min P ＜0.001),and 3DP-3DLNSS was shorter than 3DP-2DLNSS (18.3 ± 4.6 vs.23.5 ± 9.7,P =0.023).In surgical time,3DP-2DLNSS (115.7 ± 23.0) min and 3DP-3DLNSS (103.3 ± 22.8) min were shorter than 2DLNSS (132.4 ± 28.9) min (P =0.031,P ＜ 0.001).In intraoperative bleeding volume,3 DP-3 DLNSS was less than 2DLNSS (117.9 ± 17.9 vs.130.6 ± 16.8,P =0.009) ml.Fasting for 1 to 4 days after operation,with an average of (1.7 ± 0.8) days.The indwelling catheterization ranged from 1 to 8 days after operation,with an average of (3.9 ± 1.3) days.Negative pressure drainage was removed 2-9 days after operation,with an average of (4.9 ± 1.4) days.And the hospitalization 5-11 days after operation,with an average of (7.3 ± 1.5) days.Conclusions Preoperative 3D printing combined with intraoperative 3D laparoscopic nephron sparing surgery for partial endogenous renal tumors is safe and effective,which is superior to the previous CT scan alone and intraoperative 2D laparoscopic treatment.
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Objective To analyze the value of early sequential unclamping method in laparoscopic partial nephrectomy.Methods From April 2017 to October 2017,a total of 8 cases of renal tumor patients by early sequential unclamping method of laparoscopic partial nephrectomy (LPN) were reviewed,with 5 males and 3 females and average age of 56.4 years (43-70 years).Three cases of renal tumor were located on the left side,5 cases on the right side.The mean tumor diameter was 5.6 (4.6-6.4) cm.The preoperativeR.E.N.A.L.score was 8.8 (7-10),and the mean ASA score was 1.4 (1-2).Preoperative serum creatinine level was 89.5 (72.1-104.2) μmol/L,and the GFR level of the kidney with tumor before operation was 55.5 (40.4-62.3) ml/min.The early sequential unclamping method was used for retroperitoneal laparoscopic partial nephrectomy:according to the preoperative CTA results,the main branches and branches of the renal artery were routinely separated.Before the tumor resection,the branches of renal artery and the main renal artery were sequentially blocked.After removal of the tumor,the first layer of bare kidney wound blood vessels and collection system were sutured and repaired.Then released the main renal artery occlusion clamp,restored most of the blood supply to the kidney,but kept the tumor-specific segmental renal artery blocked.Continuous suture of the kidney created a rough combination of the renal wound.After second layers of suture completed,unclamped the segmental renal artery and sutured the renal wound again,made the third layers of suture intersecting with the second seam suture to strengthen the hemostatic effect.Results All the 8 patients were performed LPN with early sequential unclamping method successfully.The average operative time was 132.5 (90-180) min,the intraoperative blood loss was 142.5 (100-200) ml,the completely warm ischemia time was 15.5 (12.0-20.0) min,and no blood transfusion was performed intraoperatively and postoperatively.The operative margin was negative.The postoperative pathology showed that 7 cases were clear cell carcinoma and 1 cases of papillary cell carcinoma.Postoperative complications such as urinary leakage,incision infection and fever were not found.Drainage tube removal time was 3.5 (3-5) days and the time of postoperative hospitalization was 4.8 (4-6) days.At 1 months after operation,the serum creatinine level was 94.0 (83.6-101.2) μmol/L and the GFR level of one side kidney with tumor was 52.3 (43.2-59.6) ml/min.After 2-9 months of follow-up,there was no recurrence of the tumor.Conclusions Early sequential unclamping method could shorten the warm ischemia time and reduce the risk of bleeding during the operation.It also maintains a clear operative field,which could reduce the difficulty of laparoscopic partial nephrectomy and make a more accurate tumor resection in the complex renal tumor patients.
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Objective To explore the feasibility of 3D printing technique combined with intra-operative ultrasound for locating completely endophytic renal tumor in lapamscopic nephron-sparing surgery.Methods Fifteen patients with completely endophytic renal tumor,who undervwent 3D printing technique combined with intra-operative ultrasound assisted localization of laparoscopic partial nephrectomy from Mar.2014 to Mar.2016,received CT image 3D reconstruction and 3D printing kidney model using Fommlab Form1 + 3D printer before operation.Among 15 patients aging (55.7±10.5) years,11 patients were male and 4 were female;the tumor diameter was (2.8±1.0) cm;and 3 cases were ventral and 12 were dorsal,all had solitary tumors.The clinical data,including intra-operative blood loss,warm ischemia time,post-operative pathology and surgical margins,and post-operative renal function,were statistically analyzed in this study.Resuits Laparoscopic partial nephrectomy was successfully carried out in all cases:the average operation time was (105.0± 20.6) min,the average warm ischemia time was (22.8 ± 3.5) min,and the mean intra-operative blood loss was (87.3±15.8) mL.No case received blood transfusion during or after operation,and the average post-operative hospital stay was (6.7 ± 1.0) days.No obvious complication occurred after operation.The surgical margins were all negative.Post-operative pathology confirmed that 13 patients were with clear cell renal cell carcinoma,and 2 with papillary renal cell carcinoma.Patients were followed up for (23.7± 11.8) months,and nocontinuous deterioration of renal function or tumor recurrence was found.Conclusion Pre-operative 3D printing technique for patients with completely endophytic renal tumor can help to determine the tumor location and adjacent relationship,reducing the risk of surgery by guiding operation scheme.Meanwhile,propaganda and education using 3Dprinting kidney model can improve patients ' cognition to surgery and simplify pre-operative conversation process.Furthermore,utilizing intra-operative ultrasound to optimize tumor resection scheme can reduce the damage to the renalvessels and collection system,maximizing the clinical benefit by ensuring negative margin and renal function reservation.