Design Innovation Paper

Magnetic Chest Tube Positioning System

[+] Author and Article Information
Danuel Laan

Department of Surgery,
Division of Trauma, Critical Care,
and General Surgery,
Mayo Clinic,
200 First ST SW,
Rochester, MN 55905
e-mail: Laan.Danuel@mayo.edu

Trang Ngoc Diem Vu, Matthew Hernandez

Department of Surgery,
Division of Trauma, Critical Care, and General Surgery,
Mayo Clinic,
200 First ST SW,
Rochester, MN 55905

Henry Schiller

Department of Surgery,
Division of Trauma, Critical Care, and General Surgery,
Mayo Clinic,
200 First ST SW,
Rochester, MN 55905

1Corresponding author.

Manuscript received August 1, 2017; final manuscript received December 16, 2017; published online March 5, 2018. Assoc. Editor: Michael Eggen.

J. Med. Devices 12(2), 025001 (Mar 05, 2018) (3 pages) Paper No: MED-17-1275; doi: 10.1115/1.4039208 History: Received August 01, 2017; Revised December 16, 2017

Tube thoracostomy (TT) insertion can serve as a life-saving adjunct for thoracic trauma. Unfortunately, suboptimal positioning using the open, standard of care technique is associated with complications resulting in impaired TT function. Using a porcine model, we aimed to determine whether a magnetic chest tube positioning system (MCTPS) could be utilized to direct the intrathoracic TT position. Using recently deceased cross-bred domestic swine, we performed TT using our MCTPS and the standard of care open technique. The operator held one magnet outside of the thorax. The second magnet was positioned at the distal aspect of the TT. The operator was tasked with positioning the TT to distinct premarked intra-thoracic locations under blinded conditions. The experiment was video-recorded through an open sternotomy incision. As a control, TT was inserted using the standard of care open technique. The utilization of MCTPS successfully directed TT from one premarked location to another in 4 of 5 attempts (80%). Conversely, the control TT without magnetic guidance failed to navigate the premarked intra-thoracic locations with 0 of 5 attempts successful (p = 0.05). Positional flaws after TT placement are common. We demonstrate the feasibility of the MCTPS as an alternative to traditional hand-guided technique under simulated TT insertion conditions. The MCTPS is possibly superior to the current standard of care technique of TT. Additional studies are needed to develop this emerging technology in humans.

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Grahic Jump Location
Fig. 1

Magnetic chest tube positioning system human model representation

Grahic Jump Location
Fig. 2

Experiment design with intrathoracic locations premarked




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