目的

探索麦默通旋切系统（mammotome，MMT）常规性能以外的延展功能：麦默通扇形推进法旋切术，即利用口径为2.5 cm 旋切槽的麦默通刀头切除直径3～6 cm 良性乳腺肿物的可行性。

方法

试验组200 例， 乳腺肿物直径3～6 cm，采用麦默通手助结合超声导航下麦默通扇形推进法旋切术。 对照组200 例，病灶≤2.5 cm，接受MMT 常规手术治疗。 治疗疗效两组进行比较。 统计学分析采用卡方检验。

结果

手术操作成功率达100% 。 肿物平均切除时间为20 min，平均旋切次数50 次。 在术中出血、皮肤瘀斑、术后血肿的发生率方面经卡方检验，两组差异均无统计学意义（χ² = 0.1329， P =0.715； χ² =0.0502， P=0.823；χ² =0.0000， P=0.995）。 住院时间、手术刀痕外观及并发症方面两组相当。

结论

麦默通扇形推进法旋切术切除3～6 cm 较大良性乳腺肿块是可行的，具有安全、准确、微创、美容、并发症少等优点，有一定的应用价值。

Objective

To explore an expanding function beyond the normal capability of the mammotome system （MMT）， that is the practicability of using the MMT with 2.5 cm-caliber in fanshape rotary cutting mode to resect benign tumor of 3—6 cm in diameter.

Methods

The study group consisted of 200 patients with tumor of 3-6 cm in diameter， who received treatment of MMT fan-shape rotary cutting method.The control group consisted of 200 patients with tumor ≤2.5 cm and received routine MMT operation.The therapeutic effects of the two groups were compared.Chi-sqare test was used.

Results

A 100% successive rate of operation was obtained.The average time for resecting tumors was 20 minutes and the average of cutting times was 50.There was no statistical difference in intraoperative bleeding， skin ecchymosis and postoperative hematomas between the two groups （χ² =0.1329， P=0.715； χ² =0.0502， P=0.823；χ² =0.0000， P=0.995）.The hospitalization duration， the operation scar and other complications were similar between the two groups.

Conclusions

The MMT fan-shape rotary cutting method can be used to resect 3 - 6 cm benign breast tumors.It has the advantages of safety， accuracy， efficiency， minimal invasiveness， covert incision， good cosmetic effect and low complications.