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Research Papers

Renal Cooling Device for Use in Minimally Invasive Surgery

[+] Author and Article Information
Edward Summers, Thomas Cervantes, Rachel Batzer, Christie Simpson, Raymond Lewis, Julia Stark

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Med. Devices 6(2), 021007 (May 07, 2012) (7 pages) doi:10.1115/1.4006540 History: Received June 06, 2011; Revised March 18, 2012; Published May 07, 2012; Online May 07, 2012

Over 58,000 patients suffer from renal cell carcinoma annually in the U.S. Treatment for this cancer often requires surgical removal of the cancerous tissue in a partial nephrectomy procedure. In open renal surgery, the kidney is placed on ice to increase allowable ischemia time; however, there is no widely accepted method for reducing kidney temperature during minimally invasive surgery. A device has been designed, prototyped, and evaluated to perform effective renal cooling during minimally invasive kidney surgery to reduce damage due to extended ischemia. The device is a fluid-containing bag with foldable cooling surfaces that wrap around the organ. It is deployed through a 15 mm trocar, wrapped around the kidney, and secured using bulldog clamps. The device then fills with an ice slurry and remains on the kidney for up to 20 min. The ice slurry is then removed from the device and the device is retracted from the body. Modeling results and tests of the prototype in a simulated lab environment show that the device successfully cools porcine kidneys from 37°C to 20°C in 6–20 min.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 8

Simulated kidney in abdominal model

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Figure 7

Cooling times of various porcine kidneys in an ex vivo environment with comparison to analytical model

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Figure 6

Location of thermocouple probes inside a porcine kidney

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Figure 5

Diagram of testing environment with Kidney Cooler

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Figure 4

View of bottom surface of Kidney Cooler. Stiffening air ribs are shown oriented parallel to the kidney’s longer dimension.

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Figure 3

Initial prototype wrapped around a to-scale kidney model

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Figure 2

An exploded model view of the Kidney Cooler with relevant design features labeled

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Figure 1

The current Kidney Cooler prototype

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