[Use of disodium pamidronate in patients with bone metastases in patients with pulmonary carcinoma].
Disodium pamidronate (Aredia), a drug of the bisphosphonate group, was administered to 20 patients with pains in the bones due to secondary deposits of lung cancer. The aim of the study was to investigate the analgesic effect of pamidronate to osteolytic metastases of lung cancer in the bone. In 16 (80%) patients non-small-cell lung cancer was diagnosed, and in 4 (20%) patients small-cell-lung cancer was confirmed. Intensive disseminated pains in the bones were present in all the patients. Metastases in the skeleton were confirmed by radiography and scintigraphy of the bones. Initial values of calcium in the plasma were determined in those patients. In 11 (55%) patients, initial values of calcium in the serum were normal, and in 9 (45%) patients, they were elevated. Patients with normal calcium values received 30 mg of pamidronate in 250 ml of normal saline, and patients with hypercalcemia received 45-60 mg in 500 ml of normal saline. Analgesic effect of pamidronate was present in 12 (60%) patients, and the completely painless state was achieved in 4 out of 12 patients. Evaluation of the pain was done by questionnaire, using a simple, descriptive scale. In all 9 (100%) patients with hypercalcemia, values of calcium in plasma were normalized. Pamidronate exerted favorable analgesic effect in the case of metastases of lung cancer in the bones in more than 50% patients. Satisfactory results were also achieved in the patients non-responsive to palliative therapy by irradiation. This enables the use of opiates in lower doses.