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Oya, R. et al.

Oya, Nakamura, Ikemura, Takagi, Mugino,

AUC of Calvert's formula in targeted intra-arterial carboplatin chemoradiotherapy for cancer of the oral cavity.

We investigated whether intra-arterial administration of carboplatin using Calvert's formula is useful for avoiding thrombocytopenia in targeted chemoradiotherapy in patients with squamous cell cancer of the oral cavity and oropharynx. Carboplatin was infused intra-arterially under digital subtraction angiography in 28 patients. In the first group of patients, the dose of carboplatin was calculated according to the body surface area (BS group). In the second group, the dose was calculated using Calvert's formula (AUC group). The value for AUC (area under concentration vs time curve; mg ml(-1) min(-1)) in the formula was set at 4. 5. All patients received concurrent radiotherapy (30 Gy) and were given oral tegafur-uracil (UFT((R)), 400-600 mg day(-1)). The AUC group showed a significantly lower percentage platelet reduction than the BS group (49.0+/-22.0 vs 65.1+/-23.2%; P=0.045) and also tended to have a higher platelet nadir count (10.9+/-4.2 vs 8.4+/-5.8 x 10(4); P=0.27) without reducing the antitumour effect. The value of 4.5 for target AUC is recommended clinically. However, AUC of Calvert's formula could not predict thrombocytopenia associated with intra-arterial chemoradiotherapy due to the variability of the actual AUC.[1]

References

AUC of Calvert's formula in targeted intra-arterial carboplatin chemoradiotherapy for cancer of the oral cavity. Oya, R., Nakamura, S., Ikemura, K., Takagi, S., Mugino, H. Br. J. Cancer (2004) [Pubmed]

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