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Lidocaine intoxication in axillary block: similar pharmaceutical form, different concentration.

ABSTRACT: Local anesthetic intoxication is a medical emergency with high mortality. These drugs have not spesific antidotes, quick differential diagnosis and supportive treatment required in the case of exposure to toxic doses. We report the complications and anesthetic management of a patient who was scheduled for right carpal tunnel syndrome surgery under regional anesthesia, but mistakenly received injection of 140 mg procaine added to 10% 10 mL lidocaine (10 mL=1000mg) instead of 2% lidocaine (10mL=200 mg) as part of an axillary plexus blockade.

SUBMITTER: Erbesler ZA

PROVIDER: S-EPMC5175040 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Lidocaine intoxication in axillary block: similar pharmaceutical form, different concentration.

Erbesler Zeynel Abidin ZA Karaoren Gulsah G Dagli Recai R Cakirtekin Vedat V

Northern clinics of Istanbul 20140101 3

Local anesthetic intoxication is a medical emergency with high mortality. These drugs have not spesific antidotes, quick differential diagnosis and supportive treatment required in the case of exposure to toxic doses. We report the complications and anesthetic management of a patient who was scheduled for right carpal tunnel syndrome surgery under regional anesthesia, but mistakenly received injection of 140 mg procaine added to 10% 10 mL lidocaine (10 mL=1000mg) instead of 2% lidocaine (10mL=20 ...[more]

PMID: 28058328

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Project description:ObjectiveTo determine the synovial fluid (SF) concentrations of lidocaine and mepivacaine after intra-articular injection with clinically relevant doses to the distal interphalangeal (DIP), metacarpophalangeal (MCP), middle carpal (MC), and tarsocrural (TC) joint at two different time points after injection in order to be able to compare concentrations with previously established concentrations associated with cytotoxicity and antimicrobial activity.ProceduresIn the first of two experiments, 20 joints (5 MC, 5 MCP, 10 DIP joints) of five horses under general anesthesia were injected with clinically referenced doses of 2% lidocaine. Simultaneously, the horses had 19 joints (5 MC, 5 MCP, 9 DIP joints) injected with clinically referenced doses of 2% mepivacaine. Synovial fluid samples were collected ~7 min after injection. In experiment 2, 23 joints of seven horses under standing sedation were injected with clinically referenced doses of 2% lidocaine. Similarly, the horses had 21 joints injected with 2% mepivacaine. Synovial fluid samples were collected ~23 min after injection. The concentration of mepivacaine and lidocaine in the obtained SF samples was assessed using high-performance-liquid-chromatography with mass spectrometry detection (HPLC MS).ResultsSynovial fluid was obtained 6.8 ± 1.5 (experiment 1) and 23 ± 4.3 (experiment 2) min following intra-articular injection of mepivacaine and lidocaine. Synovial fluid concentrations of experiment 1 for lidocaine and mepivaciane were 6.46-19.62 mg/mL (mean 11.96 ± SD 3.89 mg/mL) and 5.01-13.38 mg/mL (mean 8.18 ± SD 1.76 mg/mL), respectively. In experiment 2, concentrations were 2.94-10.40 mg/mL (mean 6.31± SD 2.23 mg/mL) for lidocaine and 2.10-8.70 mg/mL (mean 4.97 ± SD 1.77 mg/mL) for mepivacaine.Conclusions and clinical relevanceIntra-articular LA injections in horses resulted in SF concentrations above those previously associated with cytotoxic effects in vitro but also above those associated with beneficial antimicrobial activities. Local anesthetic concentration was 33-60% lower after 23 min (experiment 2) than after 7 min (experiment 1).

Dataset Information

Lidocaine intoxication in axillary block: similar pharmaceutical form, different concentration.

Publications

Lidocaine intoxication in axillary block: similar pharmaceutical form, different concentration.

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