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Published in:
29-08-2016 | Original Article
Evaluation of user input methods for manipulating a tablet personal computer in sterile techniques
Published in: International Journal of Computer Assisted Radiology and Surgery | Issue 2/2017
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Abstract
Purpose
To determine a quick and accurate user input method for manipulating tablet personal computers (PCs) in sterile techniques.
Methods
We evaluated three different manipulation methods, (1) Computer mouse and sterile system drape, (2) Fingers and sterile system drape, and (3) Digitizer stylus and sterile ultrasound probe cover with a pinhole, in terms of the central processing unit (CPU) performance, manipulation performance, and contactlessness.
Results
A significant decrease in CPU score (\(p< 0.001\)) and an increase in CPU temperature (\(p< 0.001\)) were observed when a system drape was used. The respective mean times taken to select a target image from an image series (ST) and the mean times for measuring points on an image (MT) were \(5.84 \pm 2.04\) and \(5.65 \pm 1.02\) s for the computer mouse method, \(6.67 \pm 3.12\) and \(3.89 \pm 0.91\) s for the finger method, and \(4.09 \pm 1.41\) and \(3.52 \pm 0.94\) s for the digitizer stylus method, respectively. The ST for the finger method was significantly longer than for the digitizer stylus method (\(p = 0.047\)). The MT for the computer mouse method was significantly longer than for the digitizer stylus method (\(p = 0.001\)). The mean success rate for measuring points on an image was significantly lower for the finger method when the diameter of the target was equal to or smaller than 8 mm than for the other methods. No significant difference in the adenosine triphosphate amount at the surface of the tablet PC was observed before, during, or after manipulation via the digitizer stylus method while wearing starch-powdered sterile gloves (\(p = 0.89\)).
Conclusions
Quick and accurate manipulation of tablet PCs in sterile techniques without CPU load is feasible using a digitizer stylus and sterile ultrasound probe cover with a pinhole.