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S Levy

Publications and source records attributed to S Levy.

373 records · Page 21Linked to original sources
PubMedDate not supplied

Chemical synthesis and biological occurrence of carboxylic acid metabolites of delta1(6)-tetrahydrocannabinol.

Potential metabolites of (-)-3,4-trans-tetrahydrocannabinol (THC) with a carboxylic acid function in the side chain were synthesized as their methyl esters in the delta1(6)-series. The chromatographic and mass-spectrometric properties of the five side-chain homologues were examined and utilized to facilitate the isolation and the identification of the corresponding monocarboxylic acid metabolites of delta1(6)-THC in the mouse, guinea pig, and rabbit formed after ip administration. The metabolites were identified by gas chromatography and mass fragmentography. In mouse liver delta1(6)-THC-7-oic acid and 3'',4'',5''-trisnor delta1(6)-THC-2''-oic acid were identified as metabolites. In guinea pig liver these acids occurred together with 4'',5''-bisnor-delta1(6)-THC-3''-oic acid and 5''-nor-delta1(6)-THC-4''-oic acid. Rabbit liver contained delta1(6)-THC-7-oic acid, 2'',3'',4'',5''-tetranor-delta1(6)-THC-1''-oic acid and 4'',5''-bisnor-delta1(6)-THC-3''-oic acid. Further, the structure of three dicarboxylic acid metabolites of delta1(6)-THC in rabbit kidney were determined by mass spectrometry and proton magnetic resonance spectroscopy.

Animals↗
PubMedDate not supplied

[Oral ofloxacin versus intramuscular ceftriaxone in antibiotic prophylaxis in transurethral prostate resection].

This randomized prospective study evaluated the safety and efficacy of a single oral dose of OFL compared to a single parenteral dose of CTRX prior to TURP. 191 patients (mean age: 68.7 +/- 6.2 years) with bacterial free urine before surgery were enrolled and received either OFL: 400 mg per os (n = 95) or CTRX: 1 g intrasmuscularly (n = 96) at the pre-anaesthetic medication time (two hours prior TURP). Two urine cultures were obtained: on the day of the patient's discharge and within one month after surgery. Blood cultures were performed in case of temperature > 38 degrees 5C. Treatment failure was defined as bacteriuria > 10(5) CFU/ml and/or in case of positive blood culture after surgery. 182 patients were evaluable for efficacy. They were similar with respect to age, prostatic resection, histology, duration of post operative catheterization in the two treatment groups. On discharge from the department, 93.2% of the patients in the OFL group had sterile urines versus 94.6% in the CTRX group. In failure, causative pathogens were in the OFL group: 3 enterococcus, 1 acinetobacter, 1 staphylococcus, 1 citrobacter; in the CTRX group: 1 acinetobacter, 2 citrobacters, 1 enterococcus, 1 streptococcus. No bacteremia occurred. After one month of follow-up, 171 patients were evaluable (success on discharge from the department): the rates of success were: 93.5% in the OFL group and 90.3% in the CTRX group. Tolerance was good in both groups. These two drugs are as effective and as well tolerated for prevention of post operative UTI in TURP. But Ofloxacin is cost effective and simplest for use.

Administration, Oral↗
PubMedDate not supplied

[Use of percutaneous anesthesia in cardiac pacemaker implantation].

OBJECTIVES: Assess the efficacy of an anesthesic cream for pacemaker implantations. METHODS: Percutaneous anesthesia was studied in a series of permanent pacemaker transvenous implantations. The anesthesic cream composed of a mixture of lidocaine and prilocaine was applied precisely over operative areas after marking the skin. Percutaneous anesthesia should be applied 2 hours before entering the operating room. RESULTS: This percutaneous local anesthesia was perfectly effective for simple replacement procedures. At first implantations, it was used alone in 4 out of 10 cases while intradermal injections were needed to anesthetize the deep layers in the other patients. Serum concentrations indicate very low levels which are tolerated very well. CONCLUSION: Alone or combined with lidocaine infiltration, the use of an anesthesic cream is safe and effective in transvenous pacemaker surgery.

Adult↗