[Analgesia with opioids in the paediatric patient.].

Der Schmerz
C Schlünder

Abstract

Opioids have been used for analgesia in nearly all civilizations. In paediatrics their use has become widely accepted for combating severe pain, especially postoperative pain and tumour pain. Receptors in the central nervous system are the best known sites of action of opioids, but the existence of peripheral receptors is also probable. The action depends on whether the opioid is more agonist or antagonist and on the peculiarities of physiology in childhood: in the small child a hyperdynamic blood circulation makes resorption faster, and in newborn and premature infants distribution and excretion are influenced by the different composition of the body and the immaturity of liver and kidney. The best known opioid is morphine, and it is the reference substance with which all other opioids are compared. Fentanyl has been used even for the smallest ventilated prematures in recent times, as it is easy to manage and has an early onset of action. Its depressant action on the respiratory centre is an advantage when attempts of spontaneous breathing make mechanical ventilation difficult. Obstinate constipation is the disadvantage of both morphine and fentanyl, and an exacerbation of hyperbilirubinaemia has been seen with fentanyl. Nalbu...Continue Reading

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