Paracetamol permeates readily into the cerebrospinal fluid of children. This fast and extensive transfer enables the rapid central analgesic and antipyretic action of intravenous paracetamol.
Clonidine enabled stable hemodynamics and prevented activation of RAAS seen as unchanged plasma renin activity. Clonidine may be beneficial during laparoscopy in patients with hypertension, cardiovascular, and/or renal diseases.
Ibuprofen penetrates the cerebrospinal fluid readily, with peak concentrations attained 30 to 40 minutes after intravenous injection of a 10 mg/kg dose. The plasma analgesic concentration after inguinal surgery with spinal anesthesia is 10 to 25 mg/L.
This study shows that ketoprofen is able to enter the CSF of children, which enables central analgesic effects of ketoprofen. However, the slow distribution of ketoprofen into the CSF and the apparently low absolute concentrations has to be taken into account when central analgesic effects are desired.
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