Related Experiment Videos
[Cerebrospinal fluid distribution of metampicillin (author's transl)]
Unlabelled:
In order to avoid other antibiotics which interfere with plasma and CSF level determination of a given antibiotic the authors use a chemical method of established specificity. 15 patients presenting with purulent meningitis were given a standard daily dose of metampicillin and divided into 3 groups of 5. On days 2, 4 and 6 after onset of disease plasma and CSF specimens were taken at respectively 1, 2 or 4 hours following metampicillin I.V. injection according to patient group. All patients were cured between days 7 and 21 of therapy. Tolerance was good.
Results:
--there was no correlation between dose injected and plasma level of drug,--CSF distribution of metampicillin was good and stayed identical throughout the disease period,--peak CSF drug level was delayed as compared to plasma level, occurring more than 4 hours after I.V. injection of metampicillin.
Insights
This study analyzed metampicillin levels in meningitis patients, finding good drug distribution in cerebrospinal fluid (CSF) despite delayed peak levels compared to plasma. Metampicillin effectively treated purulent meningitis with good tolerance.
Area of Science:
- Pharmacology
- Infectious Diseases
- Clinical Chemistry
Background:
- Antibiotic resistance necessitates careful drug level monitoring.
- Accurate measurement of antibiotics in plasma and cerebrospinal fluid (CSF) is crucial for effective treatment, especially in meningitis.
- Chemical methods offer specificity for antibiotic level determination, avoiding interference from other drugs.
Purpose of the Study:
- To determine metampicillin levels in plasma and CSF of patients with purulent meningitis.
- To assess the pharmacokinetic profile of metampicillin in relation to disease progression.
- To evaluate the efficacy and tolerance of metampicillin in treating purulent meningitis.
Main Methods:
- A specific chemical assay was employed for antibiotic level determination.
- Fifteen patients with purulent meningitis received standard daily doses of metampicillin.
- Plasma and CSF samples were collected at 1, 2, and 4 hours post-intravenous injection on days 2, 4, and 6 of therapy.
Main Results:
- No correlation was observed between the injected dose and plasma metampicillin levels.
- Metampicillin demonstrated good distribution into the CSF, consistent throughout the disease course.
- Peak CSF drug concentrations were delayed, occurring over 4 hours after intravenous administration, compared to plasma levels.
Conclusions:
- Metampicillin achieves adequate levels in the CSF for treating purulent meningitis.
- The drug is well-tolerated and effective, with all patients showing clinical improvement.
- Understanding the pharmacokinetic profile, including delayed CSF peak levels, is important for optimizing antibiotic therapy in meningitis.