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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Griffiths, J. D. Barron, F. A. Grant, S. Bjorksten, A. R. Hebbard, P. Royse, C. F. |
| Description | Country affiliation: Australia Author Affiliation: Griffiths JD ( Department of Anaesthesia, Royal Women's Hospital, Flemington Road, Parkville, VIC 3052, Australia. james.griffiths@thewomens.org.au) |
| Abstract | BACKGROUND: The transversus abdominis plane block is a novel technique involving injection of local anaesthetic between the internal oblique and the transversus abdominis muscles of the abdominal wall. It is possible that injection of a large dose of local anaesthetic into a relatively vascular plane may result in toxic concentrations. One previously published study examined plasma lidocaine concentrations after transversus abdominus plane block and showed potentially toxic plasma concentrations. Although ropivacaine is most commonly used for this technique, plasma concentrations of ropivacaine after this block have not been reported previously. METHODS: Adult female patients undergoing elective open gynaecological surgery received bilateral ultrasound-guided transverse abdominal plane blocks before surgical incision (3 mg kg(-1) of ropivacaine diluted to 40 ml). Venous blood was collected each 15 min for the first hour, each 30 min for the second hour, and then at 3, 4, 12, and 24 h post-block. RESULTS: Twenty-eight patients were recruited. The mean (sd) peak total ropivacaine concentration occurred 30 min post-injection and was 2.54 (sd 0.75) µg ml(-1). The highest measured concentration was 4.00 µg ml(-1), also 30 min post-injection. Mean total concentrations remained above 2.20 µg ml(-1) for up to 90 min post-injection. The mean unbound peak venous concentration was 0.14 (0.05) µg ml(-1), and the peak was 0.25 µg ml(-1). CONCLUSIONS: Transversus abdominus plane block using 3 mg kg(-1) of ropivacaine produces venous plasma concentrations that are potentially neurotoxic, although broadly consistent with plasma levels found after injection at other comparable sites. |
| File Format | HTM / HTML |
| ISSN | 00070912 |
| e-ISSN | 14716771 |
| Journal | British Journal of Anaesthesia |
| Issue Number | 6 |
| Volume Number | 105 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2010-12-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Anesthesiology Abdominal Muscles Amides Blood Anesthetics, Local Nerve Block Administration & Dosage Gynecologic Surgical Procedures Ultrasonography, Interventional Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Anesthesiology and Pain Medicine |
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