Journal article 555 views
Investigation of Two Prototypes of Novel Noncontact Technologies for Automated Real-Time Capture of Incremental Drug Administration Data From Syringes
Benjamin Eagle,
David J. Williams,
John Dingley
Anesthesia & Analgesia, Volume: 125, Issue: 2, Pages: 458 - 466
Swansea University Author: John Dingley
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DOI (Published version): 10.1213/ANE.0000000000002172
Abstract
Background:An ideal electronic anesthesia recording system would be capable of not only recording physiological data but also injectable drug doses given including those given incrementally from one syringe, without recourse to manual data entry. We compared two prototype devices which wirelessly re...
| Published in: | Anesthesia & Analgesia |
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| ISSN: | 0003-2999 |
| Published: |
2017
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa32993 |
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| Abstract: |
Background:An ideal electronic anesthesia recording system would be capable of not only recording physiological data but also injectable drug doses given including those given incrementally from one syringe, without recourse to manual data entry. We compared two prototype devices which wirelessly recognised individual syringes and measured changes in their plunger positions via two different optical non-contact means, allowing calculation of incremental drug doses given.Methods:Both devices incorporated a Radio-Frequency Identification (RFID) reader which wirelessly read a unique code from an RFID tag within syringe drug labels. A custom designed cradle, oriented any inserted 1ml to 20ml syringe in a repeatable position. The "Laser" device had a moving laser beam broken by the end of the syringe plunger. The infra-red "IR" device measured time of travel of infra-red light from a sender to syringe plunger and back to a receiver. Both devices could therefore determine the drug and volume administered since the previous occasion any syringe had been used. For each syringe size of 1 ml, 2ml, 5ml, 10ml and 20 ml, 121 plunger length measurements were made over their full range with each machine against a reference method of water filling and weighing, using a randomised de Bruijn sequence.Results:For every syringe size, the Laser device showed greater accuracy and precision, lower bias and narrower Limits of Agreement (95% confidence intervals = bias +/- 1.96 SD) than the IR device when compared to the reference method. For all syringe sizes, the range of bias was -0.05 ml to 0.32 ml for the Laser, and -2.42 ml to 1.38 ml for the IR. Lin's Concordance Correlation Coefficient values for the IR versus reference methods ranged from 0.6259 to 0.9255 with the lowest co-efficients seen in syringes with the shortest distance of plunger travel (2ml and 5ml) while in Laser versus reference comparisons, these coefficients were similar (0.9641 - 0.9981) over all syringe lengths.Conclusions:Both devices measured syringe volume changes, demonstrating potential for measuring incremental drug doses, recording these and also the time of each measurement. The IR device had no moving parts which would be advantageous in a clinical situation. However the current embodiment was not deemed accurate enough for clinical use, potentially remediable through improvements in hardware and software design. The laser device showed high accuracy and precision over all syringe sizes and contained volumes and was considered potentially accurate enough for clinical use with suitable development. |
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| College: |
Faculty of Medicine, Health and Life Sciences |
| Issue: |
2 |
| Start Page: |
458 |
| End Page: |
466 |