A Wireless Near-Infrared Spectroscopy Device for Flap Monitoring: Proof of Concept in a Porcine Musculocutaneous Flap Model
Research article published in Journal of reconstructive microsurgery (2021)
Abstract
BACKGROUND: Current near-infrared spectroscopy (NIRS)-based systems for continuous flap monitoring are highly sensitive for detecting malperfusion. However, the clinical utility and user experience are limited by the wired connection between the sensor and bedside console. This wire leads to instability of the flap-sensor interface and may cause false alarms. METHODS: We present a novel wearable wireless NIRS sensor for continuous fasciocutaneous free flap monitoring. This waterproof silicone-encapsulated Bluetooth-enabled device contains two light-emitting diodes and two photodetectors in addition to a battery sufficient for 5 days of uninterrupted function. This novel device was compared with a ViOptix T.Ox monitor in a porcine rectus abdominus myocutaneous flap model of arterial and venous occlusions. RESULTS: Devices were tested in four flaps using three animals. Both devices produced very similar tissue oxygen saturation (StO2) tracings throughout the vascular clamping events, with obvious and parallel changes occurring on arterial clamping, arterial release, venous clamping, and venous release. Small interdevice variations in absolute StO2 value readings and magnitude of change were observed. The normalized cross-correlation at zero lag describing correspondence between the novel NIRS and T.Ox devices was >0.99 in each trial. CONCLUSION: The wireless NIRS flap monitor is capable of detecting StO2 changes resultant from arterial vascular occlusive events. In this porcine flap model, the functionality of this novel sensor closely mirrored that of the T.Ox wired platform. This device is waterproof, highly adhesive, skin conforming, and has sufficient battery life to function for 5 days. Clinical testing is necessary to determine if this wireless functionality translates into fewer false-positive alarms and a better user experience.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Zusammenfassung
Current near-infrared spectroscopy (NIRS)-based systems for continuous flap monitoring are highly sensitive for detecting malperfusion.
Warum dies für die Hirudotherapie relevant ist
Diese Studie testete einen neuartigen tragbaren drahtlosen NIRS-Sensor für das kontinuierliche Monitoring fasziokutaner freier Lappen und verglich ihn mit einem ViOptix T.Ox-Kabelmonitor in einem porzinen Rektus-abdominus-Myokutanlappen-Modell. Die Untersuchung an vier Lappen bei drei Tieren zeigte, dass beide Geräte während arterieller und venöser Klemmereignisse sehr ähnliche Aufzeichnungen der Gewebesauerstoffsättigung lieferten, mit einer normalisierten Kreuzkorrelation von über 0,99. Die Autoren schlussfolgern, dass das drahtlose Gerät die kabelgebundene Plattform eng abbildete, und merken an, dass klinische Tests erforderlich sind, um zu bestimmen, ob dies in weniger falsch-positiven Alarmen resultiert. Es handelt sich um eine Gerätestudie im Tiermodell. Das Abstract enthält keine Erwähnung von Blutegeln, Hirudotherapie oder dem Blutegelsekretom, und es besteht keine vertretbare Verbindung zu ASHs Domäne.
Zitation
A Wireless Near-Infrared Spectroscopy Device for Flap Monitoring: Proof of Concept in a Porcine Musculocutaneous Flap Model
Wu C et al. · Journal of reconstructive microsurgery, 2021
Verwandter klinischer Kontext
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