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  • Title: The role of selective beta 1-blocker in the preoperative preparation of thyrotoxicosis: a comparative study with propranolol.
    Author: Vickers P, Garg KM, Arya R, Godha U, Mathur P, Jain S.
    Journal: Int Surg; 1990; 75(3):179-83. PubMed ID: 2242971.
    Abstract:
    Subtotal thyroidectomy was performed for hyperthyroidism on 130 patients; 95 treated before surgery with propranolol (Group I) and 35 given only metoprolol before surgery (Group II). These patient groups were compared with reference to preoperative medication, operative and immediate postoperative course, and late results with follow-up for one to five years. Clinical response was 100% in group II and 94.7% in group I. The median length of preoperative treatment was 7.96 +/- 1.84 days in group I and 6.25 +/- 1.73 days in group II (P less than 0.05). There were no serious adverse effects of the drugs in either treatment group. No anaesthesiologic or cardiovascular complication occurred during operation in either group. Ten patients in group I (10.5%) and six patients in group II (11.4%) observed hyperthyroid manifestations in the immediate postoperative period, eliminated by the administration of the propranolol/metoprolol, and no case of thyroid storm occurred. One patient in group II developed clinical hypocalcaemia. Two patients, one in each group, presented temporary unilateral recurrent laryngeal nerve paralysis. There were two recurrences of toxicity in group I (2.1%) and none in group II. Hypothyroidism occurred in 3 patients (2.3%) two of them were from group I and one was from group II. The postoperative hospital stay was 4.62 +/- 1.61 days in group I and 2.81 +/- 1.32 days in group II (P less than 0.05). One patient from group I died on the third postoperative day due to pulmonary oedema. The results suggest that metoprolol can be safely used and offers the advantages of desired clinical response, shorter preoperative preparation time, simplicity of dosage and shorter postoperative hospital stay in comparison to propranolol for preoperative treatment of hyperthyroidism.
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