The Experts below are selected from a list of 1374 Experts worldwide ranked by ideXlab platform
Pradeep Rao - One of the best experts on this subject based on the ideXlab platform.
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Single-Port-Access nephrectomy and other Laparoscopic urologic procedures using a novel Laparoscopic Port (R-Port).
Urology, 2008Co-Authors: Abhay Rane, Prashanth P Rao, Pradeep RaoAbstract:Objectives To rePort an initial clinical urologic experience with a new Laparoscopic Access Port (R-Port) and the advent of the single-Port Access (SPA) procedure and one-Port umbilical surgery (OPUS). Methods Five patients underwent therapeutic Laparoscopic interventions (two simple nephrectomies for end-stage kidney disease consequent to stone disease, one orchidopexy, one orchidectomy, and one ureterolithotomy), with one R-Port used for each. Three of these procedures were OPUS, and the other two were SPA procedures. In all cases a 5-mm 30° telescope and two 5-mm working instruments were inserted through the Port. In the case of the nephrectomies, hemostasis and pedicle control was obtained with the Harmonic Scalpel and Hem-o-lok clips; a novel multi-instrument Port cap allowed for safe introduction of a 10-mm clip applier. Frequent instrument changes effected as necessary to allow the operative procedure to proceed to completion did not affect the seal. Results All procedures were completed uneventfully. Operative time averaged 83 minutes. There were no perioperative Port-related or surgical complications in these cases. Conclusions The R-Port allows Laparoscopic surgery to be performed safely with fewer Ports, thereby allowing for SPA and OPUS with their inherent cosmetic advantages and reduction in postoperative discomfort. More studies are being carried out.
Young-joong Kim - One of the best experts on this subject based on the ideXlab platform.
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Toward Microendoscopic Electrical Impedance Tomography for Intraoperative Surgical Margin Assessment
IEEE transactions on bio-medical engineering, 2014Co-Authors: Ryan J. Halter, Young-joong KimAbstract:No clinical protocols are routinely used to intraop- eratively assess surgical margin status during prostate surgery. Instead, margins are evaluated through pathological assessment of the prostate following radical prostatectomy, when it is too late to provide additional surgical intervention. An intraoperative de- vice potentially capable of assessing surgical margin status based on the electrical property contrast between benign and malig- nant prostate tissue has been developed. Specifically, a microen- doscopic electrical impedance tomography (EIT) probe has been constructed to sense and image, at near millimeter resolution, the conductivity contrast within heterogeneous biological tissues with the goal of providing surgeons with real-time assessment of margin pathologies. This device consists of a ring of eight 0.6-mm diameter electrodes embedded in a 5-mm diameter probe tip to enable Access through a 12-mm Laparoscopic Port. Experiments were performed to evaluate the volume of tissue sensed by the probe. The probe was also tested with inclusions in gelatin, as well as on a sample of porcine tissue with clearly defined regions of adipose and muscle. The probe's area of sensitivity consists of a circular area of 9.1 mm 2 and the maximum depth of sensitivity is approximately 1.5 mm. The probe is able to distinguish between high contrast muscle and adipose tissue on a sub-mm scale (500 μm). These preliminary results suggest that EIT is possible in a probe designed to fit within a 12-mm Laparoscopic Access Port. Index Terms—Electrical impedance tomography (EIT), prostate cancer, radical prostatectomy (RP), surgical margin assessment.
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Toward Microendoscopic Electrical Impedance Tomography for Intraoperative Surgical Margin Assessment
IEEE transactions on bio-medical engineering, 2014Co-Authors: Ryan J. Halter, Young-joong KimAbstract:No clinical protocols are routinely used to intraoperatively assess surgical margin status during prostate surgery. Instead, margins are evaluated through pathological assessment of the prostate following radical prostatectomy, when it is too late to provide additional surgical intervention. An intraoperative device potentially capable of assessing surgical margin status based on the electrical property contrast between benign and malignant prostate tissue has been developed. Specifically, a microendoscopic electrical impedance tomography (EIT) probe has been constructed to sense and image, at near millimeter resolution, the conductivity contrast within heterogeneous biological tissues with the goal of providing surgeons with real-time assessment of margin pathologies. This device consists of a ring of eight 0.6-mm diameter electrodes embedded in a 5-mm diameter probe tip to enable Access through a 12-mm Laparoscopic Port. Experiments were performed to evaluate the volume of tissue sensed by the probe. The probe was also tested with inclusions in gelatin, as well as on a sample of porcine tissue with clearly defined regions of adipose and muscle. The probe's area of sensitivity consists of a circular area of 9.1 mm(2) and the maximum depth of sensitivity is approximately 1.5 mm. The probe is able to distinguish between high contrast muscle and adipose tissue on a sub-mm scale (∼500 μm). These preliminary results suggest that EIT is possible in a probe designed to fit within a 12-mm Laparoscopic Access Port.
Abhay Rane - One of the best experts on this subject based on the ideXlab platform.
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Single-Port-Access nephrectomy and other Laparoscopic urologic procedures using a novel Laparoscopic Port (R-Port).
Urology, 2008Co-Authors: Abhay Rane, Prashanth P Rao, Pradeep RaoAbstract:Objectives To rePort an initial clinical urologic experience with a new Laparoscopic Access Port (R-Port) and the advent of the single-Port Access (SPA) procedure and one-Port umbilical surgery (OPUS). Methods Five patients underwent therapeutic Laparoscopic interventions (two simple nephrectomies for end-stage kidney disease consequent to stone disease, one orchidopexy, one orchidectomy, and one ureterolithotomy), with one R-Port used for each. Three of these procedures were OPUS, and the other two were SPA procedures. In all cases a 5-mm 30° telescope and two 5-mm working instruments were inserted through the Port. In the case of the nephrectomies, hemostasis and pedicle control was obtained with the Harmonic Scalpel and Hem-o-lok clips; a novel multi-instrument Port cap allowed for safe introduction of a 10-mm clip applier. Frequent instrument changes effected as necessary to allow the operative procedure to proceed to completion did not affect the seal. Results All procedures were completed uneventfully. Operative time averaged 83 minutes. There were no perioperative Port-related or surgical complications in these cases. Conclusions The R-Port allows Laparoscopic surgery to be performed safely with fewer Ports, thereby allowing for SPA and OPUS with their inherent cosmetic advantages and reduction in postoperative discomfort. More studies are being carried out.
Ryan J. Halter - One of the best experts on this subject based on the ideXlab platform.
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Toward Microendoscopic Electrical Impedance Tomography for Intraoperative Surgical Margin Assessment
IEEE transactions on bio-medical engineering, 2014Co-Authors: Ryan J. Halter, Young-joong KimAbstract:No clinical protocols are routinely used to intraop- eratively assess surgical margin status during prostate surgery. Instead, margins are evaluated through pathological assessment of the prostate following radical prostatectomy, when it is too late to provide additional surgical intervention. An intraoperative de- vice potentially capable of assessing surgical margin status based on the electrical property contrast between benign and malig- nant prostate tissue has been developed. Specifically, a microen- doscopic electrical impedance tomography (EIT) probe has been constructed to sense and image, at near millimeter resolution, the conductivity contrast within heterogeneous biological tissues with the goal of providing surgeons with real-time assessment of margin pathologies. This device consists of a ring of eight 0.6-mm diameter electrodes embedded in a 5-mm diameter probe tip to enable Access through a 12-mm Laparoscopic Port. Experiments were performed to evaluate the volume of tissue sensed by the probe. The probe was also tested with inclusions in gelatin, as well as on a sample of porcine tissue with clearly defined regions of adipose and muscle. The probe's area of sensitivity consists of a circular area of 9.1 mm 2 and the maximum depth of sensitivity is approximately 1.5 mm. The probe is able to distinguish between high contrast muscle and adipose tissue on a sub-mm scale (500 μm). These preliminary results suggest that EIT is possible in a probe designed to fit within a 12-mm Laparoscopic Access Port. Index Terms—Electrical impedance tomography (EIT), prostate cancer, radical prostatectomy (RP), surgical margin assessment.
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Toward Microendoscopic Electrical Impedance Tomography for Intraoperative Surgical Margin Assessment
IEEE transactions on bio-medical engineering, 2014Co-Authors: Ryan J. Halter, Young-joong KimAbstract:No clinical protocols are routinely used to intraoperatively assess surgical margin status during prostate surgery. Instead, margins are evaluated through pathological assessment of the prostate following radical prostatectomy, when it is too late to provide additional surgical intervention. An intraoperative device potentially capable of assessing surgical margin status based on the electrical property contrast between benign and malignant prostate tissue has been developed. Specifically, a microendoscopic electrical impedance tomography (EIT) probe has been constructed to sense and image, at near millimeter resolution, the conductivity contrast within heterogeneous biological tissues with the goal of providing surgeons with real-time assessment of margin pathologies. This device consists of a ring of eight 0.6-mm diameter electrodes embedded in a 5-mm diameter probe tip to enable Access through a 12-mm Laparoscopic Port. Experiments were performed to evaluate the volume of tissue sensed by the probe. The probe was also tested with inclusions in gelatin, as well as on a sample of porcine tissue with clearly defined regions of adipose and muscle. The probe's area of sensitivity consists of a circular area of 9.1 mm(2) and the maximum depth of sensitivity is approximately 1.5 mm. The probe is able to distinguish between high contrast muscle and adipose tissue on a sub-mm scale (∼500 μm). These preliminary results suggest that EIT is possible in a probe designed to fit within a 12-mm Laparoscopic Access Port.
Yih-huei Uen - One of the best experts on this subject based on the ideXlab platform.
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Feasibility of single-Port Laparoscopic cholecystectomy using a homemade Laparoscopic Port: a clinical rePort of 50 cases
Surgical Endoscopy, 2011Co-Authors: Kuo-chang Wen, Kai-yuan Lin, Yi Chen, Yi-feng Lin, Kuo-shan Wen, Yih-huei UenAbstract:Aim To rePort the clinical experience of transumbilical single-Port Laparoscopic cholecystectomy (TUSPLC), using a homemade Laparoscopic Access Port composed of two inexpensive and common pieces of equipment readily available in the operating room. Methods Fifty consecutive patients with gallstones, including ten patients (20%) with acute cholecystitis, underwent single-Port Laparoscopic cholecystectomy (LC) using a homemade single Port composed of a segment of corrugated breathing tube and a pair of surgical gloves. The Port was inserted into the umbilicus for simultaneous placement of multiple conventional instruments into the abdominal cavity. All patients underwent dome-down LC using traditional instruments with manually angulated shafts; dissection was done using electrocautery or harmonic scalpel. Results All but two procedures were completed uneventfully. Two patients with acute cholecystitis due to dense adhesions in the triangle of Calot necessitated conversion to two- and four-Port Laparoscopic procedures, respectively. Operative time averaged 73 ± 2 min for chronic cholecystitis and 95 ± 5 min for acute cholecystitis. There were no perioperative Port-related or surgical complications, except for two patients who developed wound seroma and recovered after conservative treatment. We found that healing of the umbilical wound left virtually no scar in all patients. Conclusion The homemade umbilical Port rePorted in this study is useful for multiple instrument Access and allows TUSPLC to be performed safely, with its inherent cosmetic and cost advantages. Further studies of this technique are ongoing.
