Randomized clinical trial to assess pain and bruising in medicines administered by means of subcutaneous and intramuscular needle injection: Is it necessary to have needles changed? Ensayo clínico aleatorio para evaluación del dolor y hematoma durante la administración de medicamentos por vía subcutánea e intramuscular: ¿Es necesario cambiar las agujas? Ensaio clínico randomizado para avaliação de dor e hematoma em administração de medicamentos por via subcutânea e intramuscular: há necessidade de troca de agulhas?

This clinical trial aimed at comparing the intensity of pain and bruising by subcutaneous and intramuscular injections using and retractable fixed syringes and needles and syringes with no needles combined, at a public hospital in Sao Paulo, for six months. We evaluated the perception of pain in cas...

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