Bilateral transversus abdominis plane (TAP) block with 24 hours ropivacaine infusion via TAP catheters: A randomized trial in healthy volunteers.
BMC Anesthesiol
; 13(1): 30, 2013 Oct 10.
Article
em En
| MEDLINE
| ID: mdl-24106815
ABSTRACT
BACKGROUND:
The analgesic effect of a TAP block has been investigated in various surgical settings. There are however limited information about block level and block duration. Furthermore, there is a lack of information about continuous TAP block after ultrasound-guided posterior TAP blocks.The aim of this double-blind randomized study was therefore to investigate the effect of an ultrasound-guided posterior TAP block with 24 hours local anesthetic infusion via a TAP catheter.METHODS:
In this randomized study 8 male volunteers received a bilateral TAP block (20 mLs 0.5% ropivacaine) and were allocated to receive active infusion (ropivacaine 0.2% 5 mL/hr) via a TAP catheter on one side and placebo infusion on the other side. PRIMARYOUTCOME:
Dermatomal sensory block involvement after 24 hours evaluated with pinprick. SECONDARYOUTCOMES:
Sensory block involvement evaluated with cold test and heat-pain detection thresholds (HPDT) on the abdominal wall. Assessment points 15 min before block performance and 1, 4, 8, 12 and 24 hours after block performance.RESULTS:
The TAP block primarily involved sensory changes in the Th10 to Th12 dermatomes. On the placebo side there was a decrease in extension beginning at 4-8 hours after block performance and with no detectable effect beyond 12 hours. Median number of dermatomes anesthetized (pinprick) at 24 hours after block performance was 1.5 (0-3) on the active side compared with 0 (0-0) on the placebo side (P = 0.039).There were no statistical significant between-side differences in HPDT measurements at 24 hours after block performance.CONCLUSIONS:
The spread of sensory block following ultrasound-guided posterior TAP block is partly maintained by a continuous 24 hour ropivacaine infusion through a TAP catheter. TRIAL REGISTRATION The study was registered at NCT01577940.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Clinical_trials
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article