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目的:探讨2种不同直径(0.4和0.6 mm)活塞小柱对镫骨活塞术后患者早期听力结果的影响。方法:收集2001~2006年的耳硬化症患者44例,随机分成2组:0.4mm组24例,0.6mm组20例。在术前和术后3~4周分别统计250、500、1000、2000、4000Hz频率平均气骨导差,及2组术后平均气骨导差的缩小值,并用t检验分析其差异。结果:经t检验,0.6mm组在术后早期(3~4周)听力恢复明显好于0.4mm组,差异有统计学意义(P<0.01)。6个月以后2组听力检测差异无统计学意义(P>0.05)。结论:活塞小柱直径大小对镫骨活塞术患者早期听力恢复有明显影响,直径较大者患者听力提高较好。
Objective: To investigate the effects of two different diameters (0.4 and 0.6 mm) piston post-mortem on early hearing outcomes of postoperative patients with tarsal piston. Methods: Forty-four patients with otosclerosis were collected from 2001 to 2006 and randomly divided into two groups: 24 in 0.4 mm group and 20 in 0.6 mm group. The average airway densities at 250, 500, 1000, 2000 and 4000 Hz were calculated preoperatively and at 3 to 4 weeks postoperatively, and the reduction of average airway conductance was compared between the two groups. The differences were also analyzed by t test. Results: The t test showed that the hearing recovery of the 0.6mm group was significantly better than that of the 0.4mm group in the early postoperative period (3-4 weeks), the difference was statistically significant (P <0.01). There was no significant difference in hearing test between the two groups after 6 months (P> 0.05). Conclusion: The diameter of piston rod has significant effect on early hearing recovery in patients with tarsal piston surgery. The patients with larger diameter have better hearing ability.