Tissue morcellator for use during laparoscopic renal surgery Group: Rachel Shevchek Bracken King Kareem Mawad Mentor: Dr. Jaime Landman Instructor: Dr. Joseph Klaesner BME 401 Preliminary report presentation February 23, 2004 Overview Background Need Solutions Design specifications Schedule Group tasks Renal anatomy Located below rib cage on either side of spine Size of a fist Filters blood to eliminate waste and form urine http://ad2004.com/Biblecodes/matimages/anatomy.gif Renal disorders Kidney stones Polycystic kidney disease (PKD) End-stage renal disease (ESRD) Kidney cancer Treatment options – Dialysis – Transplantation – Nephrectomy Laparoscopic Surgery Pioneered in early 1990’s1 Minimally invasive Faster recovery, reduced scarring Open surgery Laparoscopic http://www.lij.edu/lijh/urology/laparoscopy/nephrectom Removing the kidney Open surgery2 – 25-50 cm incision Hand-assisted laparoscopy – 6-8 cm incision Laparascopic morcellation – 1 cm incision Morcellation—the grinding and removal of tissue http://www.safeconduct.com/product/LSH.htm Electric Morcellators Kidney isolated in bag – LapSac or Endocatch Used blades to grind tissue, suction to remove Proven unsafe because bag easily punctured Electric Morcellators Cook morcellator 5,275,609 Steiner morcellator 6,572,632 Coherent morcellator 6,156,049 Existing Solutions Manual morcellation4 (LapSac) – Use ring forceps to extract specimens through 12 mm incision – Mean time: 9.24 mins (in vitro) – Mean fragment size: 1.47 grams Modified manual morcellation (EndoCatch II) – Extra 3 cm incision to view tissue being extracted – Mean time: 3.24 mins (in vitro), 11 mins (clinical) – Mean fragment size: 4.46 grams Design Specifications: Safety No damage to bag (LapSac) – Less than 1% puncture rate during in vitro trials by trained surgeon – Retain impermeability properties No damage to body – Must not add to recovery time – No additional incisions – Biocompatible Design Specifications: Instrumentation Breaks down tissue Works with available facilities – Suction: 200 mmHg; Voltage: 110 V Removes tissue from modified trocar – Mean fragment diameter: 9 mm – Mean fragment weight: 4.0 grams Allows pathological evaluation Time for morcellation (< 15 mins) Comfortable for use – Weight: < 1 kg; Volume: 1 ft3 box Schedule Date 2/23 3/1 3/8 3/15 3/22 3/29 4/5 4/12 4/19 4/26 4/28 1st Paper/ Presentation Concept Generation Concept Research Decision Matrices Concept Selection 2nd Paper/ Presentation Manufacturing Research Embodiment Optimization Fabrication 3rd Paper/ Presentation Group responsibilities Bracken King – Material properties – Computer programming Kareem Mawad – Electronics – AutoCad Rachel Shevchek – Web design – Contact, marketing References Clayman RV, Kavoussi LR, Soper NJ: Laparoscopic nephrectomy: initial case report. J Urol 146: 278-282, 1991. Landman J, Collyer W, Olweny E, Andreoni C, McDougall E, Clayman R: Laparoscopic renal ablation: an in vitro comparison of currently available electrical tissue morcellators. Urology 56: 677-681, 2000. Clayman RV, Shalhav A, Hoenig D, "Laparopscopic Nephrectomy for Benign and Malignant Renal Disease," in Laparoscopic Surgery, Cueto- Garcia J, Jacobs M, Gagner M, New York: McGraw Hill, 2003, 549-565. Landman J, Venkatesh R, Kibel A, Vanlangendonck R: Modified renal morcellation for renal cell carcinoma: laboratory experience and early clinical application. Urology 62: 632-635, 2003. Personal communication with Dr. Landman, Dr. Lieber, Dr. Venkatesh For patent search http://www.uspto.gov Questions?
Pages to are hidden for
"Tissue morcellator for use during laparoscopic renal surgery"Please download to view full document