Evaluation of tissue oxygenation and block quality using Near Infrared Spectroscopy (NIRS) in patients undergoing ultrasound-guided infraclavicular block at different arm angles A prospective observational study.

医学 充氧 前臂 肘部 麻醉 超声波 核医学 神经阻滞 封锁 外科 内科学 放射科 受体
作者
Orhan Binici,Mahmut Alp Karahan,Evren Büyükfırat
出处
期刊:PubMed 卷期号:90: 357-363 被引量:2
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The preference for peripheral nerve block methods is increasing with every passing day. Our aim in this study is to evaluate tissue oxygenation using a near-infrared spectroscopy (NIRS), as a non-invasive device that detects tissue oxygen saturation (St02), in patients subjected to infraclavicular blockage at different angles.Included in the study were 34 patients aged between 18 and 65 in the ASA I-II group who were scheduled to undergo hand, forearm or arm surgery. An infraclavicular block was applied with the shoulder abducted at 0°, 45° and 90° under USG guidance while the elbow was in extension. The St02 values of the patients were measured with NIRS in both arms every five minutes.A p value of <0.05 was considered statistically significant. Tissue oxygenation in the arm subjected to blockade increased significantly over time (p<0.001), while tissue oxygenation in the untreated arm did not change over time. The duration of the sensory blockade differed significantly only for values between 0 and 90 (p = 0.046). The block application time was lower at a 90° angle (p <0.001), and the satisfaction level decreased as the number of needle entries increased (p<0.001). Patient satisfaction increased as the angle increased (p=0.002).It was demonstrated that tissue oxygenation increased with NIRS in the extremity subjected to blockade in patients who underwent a USG-guided infraclavicular block at different angles; however, different angles were not observed to affect tissue oxygenation.Near-infrared spectroscopy, Tissue oxygen saturation, Ultrasound, Infraclavicular block.Il blocco anestetico dei nervi periferici acquista sempre maggiori preferenze, e con questo studio abbiamo voluto valutare l’ossigenazione dei tessuti in pazienti sottoposti a blocco infraclavicolare ad angoli diversi usando una spettroscopia nel vicino infrarosso (NIRS), come un dispositivo non invasivo che rileva la saturazione di ossigeno nei tessuti (St02). Sono stati studiati 34 pazienti di età compresa tra 18 e 65 anni, classificati ASA I-II in programma per essere sottoposti ad un intervento chirurgico alla mano, all’avambraccio o al braccio. È stato adottato un blocco infraclavicolare con spalla abdotta a 0°, 45°, e 90° sotto guida US, con gomito in estensione. I valori di saturazione di ossigeno sono stati rilevati con apparecchio NIRS in entrambe le braccia ogni cinque minuti. Statisticamente è stato assunto come valore significativo p <0,05. L’ossigenazione tissutale nel braccio sottoposto a blocco è aumentata significativamente nel tempo (p <0,001), mentre l’ossigenazione del tessuto nel braccio non trattato non è cambiata nel tempo. La durata del blocco sensoriale differiva significativamente solo per valori compresi tra 0 e 90 (p = 0,046). Il tempo di applicazione del blocco era imferiore con un angolo di 90° (p <0,001) e il livello di soddisfazione diminuiva all’aumentare del numero di agji impiegati (p <0,001). La soddisfazione del paziente risulta aumentare con l’aumentare dell’angolo (p = 0,002). L’ossigenazione dei tessuti non sembra essere influenzata falla diversità dell’angolazione.

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