Background: To date, no study has explored the effect of bent length on lightwand intubation. For successful intubation in daily practice, the authors found that bent length should be approximated to the patient's thyroid prominence-to-mandibular angle distance (TMD), but some patients have a TMD much shorter than the suggested bent length range. The purposes of this study were to understand TMD distribution in adults and to test the influence of bent length on lightwand intubation.
Methods: The TMD, airway, and demographic data of 379 patients were collected. To test the bent length influence, patients were enrolled in group A (158 patients, TMD <= 5.5 cm) and group B (131 patients, TMD > 5.5 cm) and were intubated randomly using the lower (6.5 cm) and upper (8.5 cm) limits of the suggested range. Success rate and lightwand search time were compared.
Results: In group A, the success rate was 98.8% with 6.5-cm bent length and 78.2% with 8.5-cm bent length (P < 0.05). Search times were 5.7 +/- 2.90 and 8.9 +/- 5.80 s with 6.5- and 8.5-cm bent length, respectively (P < 0.01). In group B, there was no statistical difference in success rate and search time between 6.5- and 8.5-cm bent length. 相似文献
Restriction fragment length polymorphisms (RFLPs) of peripheral leucocyte DNA in insulin-dependent diabetes mellitus (IDDM) patients and in controls were studied with Southern blot analysis. IDDM has been reportedly associated positively with the HLA-DR3 and-DR4 in Caucasians, with the HLA-DR3 and-DR9 in Chinese, and negatively with the HLA-DR2 in both Caucasians and Chinese, Using an HLA-DQβcDNA probe, an EcoRI 2.2 kb fragment is found associated with DR2 controls (r = 0.78, P=1×10~(-6)), but not with DR2 IDDM patients, their respective frequencies being significantly different (P=0.02). The authors also report here their new findings that the frequencies of the EcoRI3.0 kb and BamHI3.3 kb fragments are both decreased in the patient group (P=0.0032 and P=0.0018 respectively). This suggested certain kinds of mutation such as partial deletion or others in the IDDM patients might have caused the RFLP pattern change as compared to the normal DNA. RFLPs may provide valuable information in searching for the genetic basis of IDDM. 相似文献
Eighteen trabeculectomy specimens of congenital glaucoma were examined by light and transimssion electron microscopy. The results showed that the primary anomalies in congenital glaucoma included the developmental defects of trabecular meshwork, excessive collagen fibrils in the trabecular matrix, shifting forward of ciliary muscle fibres and persistent mesenchymal tissues in the anterior-chamber angle. The authors also pointed out the importance of the secondary lesions of the trabecular meshwork in the pathogenesis of congenital glaucoma. Eye Science 1994; 10:50-56. 相似文献