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Design Innovation

Design of a Surgical Port for Minimally Invasive Beating-Heart Intracardial Procedures

[+] Author and Article Information
Christopher M. DiBiasio, Keith V. Durand, Jonathan Hopkins, Zach Traina, Nikolay V. Vasilyev, Pedro J. del Nido

 Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, MA 02139 Children’s Hospital of Boston, Department of Cardiac Surgery, Boston, MA 02115

Alexander H. Slocum1

 Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, MA 02139slocum@mit.edu Children’s Hospital of Boston, Department of Cardiac Surgery, Boston, MA 02115slocum@mit.edu

1

Corresponding author.

J. Med. Devices 5(4), 045001 (Nov 07, 2011) (5 pages) doi:10.1115/1.4004867 History: Received March 08, 2011; Revised July 20, 2011; Published November 07, 2011; Online November 07, 2011

Direct-access, minimally invasive, beating-heart intracardial procedures have the potential to replace many traditional surgical procedures requiring cardio-pulmonary bypass as long as micro-emboli are prevented from entering the cardiovascular system. A new surgical port was developed to introduce surgical instruments into chambers of the beating heart during minimally invasive, intracardial surgical procedures without allowing the introduction of micro-emboli 0.1 mm or larger in size. The design consists of an outer port body that is secured to the heart wall using a purse string suture and a series of inner tubular sleeves that form the interface between the port and the transecting instrument. The design enables rapid tool changes and accommodates a wide variety of instruments. The port uses a fluid purging system to dislodge and remove emboli from a surgical instrument. Laboratory and clinical tests show that the port adequately seals around a surgical instrument and prevents the introduction of emboli with diameters greater than 0.1 mm into the heart while minimizing hemorrhage.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 3

Images of the (a) in vivo experiments used to validate the port operation and (b) bubbles introduced with flushing system disabled. The tip of port [1], the tip of the tool [2], and an embolus (dashed oval) are clearly visible in the ultrasound image.

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Figure 2

Trileaflet end seal design in the (a) closed and (b) open positions

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Figure 1

Solid model (a) and as fabricated (b) surgical port

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