Trial reportArchives of toxicology2021
Quantification of systemic o-toluidine after intrathecal administration of hyperbaric prilocaine in humans: a prospective cohort study.
Trial report in Archives of toxicology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03642301 (Dosing of Carcinogenic Complexes Such as Urinary O-toluidine and Hemoglobin Adducts From O-toluidine in Blood After Intrathecal Administration of 50 mg Hyperbaric Prilocaine), which is not on this map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Dosing of Carcinogenic Complexes Such as Urinary O-toluidine and Hemoglobin Adducts From O-toluidine in Blood After Intrathecal Administration of 50 mg Hyperbaric Prilocaine
Who cites it
0 citing papers in PubMed, 3 citations in OpenAlex.
No citing paper in PubMed yet.
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hyperbaric 2% prilocaine is increasingly used for spinal anesthesia. It is the only local anesthetic metabolized to o-toluidine, a human bladder carcinogen. Increase of o-toluidine hemoglobin adducts, a marker of o-toluidine ability to modify the DNA structure, was described following subcutaneous injection. In this prospective cohort study we aimed to assess and quantify o-toluidine hemoglobin adducts and urinary o-toluidine after a single intrathecal dose of hyperbaric prilocaine.10 patients undergoing surgery received 50 mg of hyperbaric prilocaine intrathecally. Blood and urine samples were collected before injection and up to 24 h later (Hospital Braine l'Alleud-Waterloo, Braine l'Alleud, Belgium). Urinary o-toluidine and o-toluidine hemoglobin adducts were measured by tandem mass-spectrometry after gas-chromatographic separation (Institute of the Ruhr-Universität, Bochum Germany). The trial was registered to ClinicalTrials.gov (NCT03642301; 22-08-2018)Intrathecal administration of 50 mg of hyperbaric prilocaine leads to a significant increase of o-toluidine hemoglobin adducts (0.1 ± 0.02-11.9 ± 1.9 ng/g Hb after 24 h, p = 0.001). Peak of urinary o-toluidine was observed after 8 h (0.1 ± 0.1-460.5 ± 352.8 µg/L, p = 0.001) and declined to 98 ± 66.8 µg/L after 24 h (mean ± SD)Single intrathecal administration of hyperbaric prilocaine leads to a systemic burden with o-toluidine and o-toluidine hemoglobin adducts. O-toluidine-induced modifications of DNA should be examined and intrathecal hyperbaric prilocaine should not be proposed to patients chronically exposed to o-toluidine.Clinical trial number and registry URL NCT03642301.
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