下颌骨即刻植骨术后延期愈合的临床分析

目的探讨下颌骨缺损即刻植骨修复术后,伤口延期愈合的影响因素。方法将下颌骨即刻植骨分为Ⅰ期愈合组和延期愈合组,回顾性地查阅住院病历,按预先设计的表格填写有关项目。结果下颌骨即刻植骨的愈合与患者的年龄、受骨区是否有手术史、植骨的类型、植骨的大小无关;术中口内外相通是植骨延期愈合的主要因素。结论下颌骨良性病变即刻植骨修复时,应密切关注术区与口内外穿通情况,进行有针对性地处理,争取植骨Ⅰ期愈合。     

腮腺手术中耳大神经后支保留的临床意义

目的 探讨腮腺手术中耳大神经后支保留的可行性、方法及临床价值。方法 我们对48例腮腺肿瘤患者，按常规隐蔽切口腮腺手术方法进行治疗，保留或不保留耳大神经后支。分别于术后10d及1、6、12个月进行随访，检测耳廓上部、耳垂、耳下区、耳前区和耳后区的触觉、痛觉，并观察其感觉变化情况。结果 48例中35例耳大神经后支保留，耳廓上部及耳后区感觉无减退。术后早期耳前、耳垂及耳下区感觉有不同程度的减退，以耳前区最明显，随着时间延长症状逐步好转，6个月时感觉接近正常。另13例耳大神经切断患者感觉减退症状更加明显，恢复时间延长。结论 腮腺手术中耳大神经后支保留是可行的，所采用的方法可靠，可减轻局部麻木感，提高患者术后早期生活质量，降低神经切断后产生局部永久性麻木的可能性。     

Transitional properties of the mechanically evoked perioral reflex from infancy through adulthood

The organization of motor responses in the orbicularis oris muscle following the delivery of punctate mechanical inputs to vermilion skin of the lips was studied in a group of young infants, school-age children, and adults during periods of voluntary lip muscle activation. A specially designed multi-point array skin contactor, coupled to a position-servo controlled linear motor, was highly effective in driving the early component of the perioral reflex (R1). Overall, the evoked R1 response obtained from the infant was of variable amplitude relative to the children and adults, lacked response specificity, and occurred it a longer latency. This brainstem mediated sensorimotor action appears to take on several characteristics of the adult form by the age of 12. The emergence and maturation of mechanically evoked perioral reflexes is discussed in relation to the acquisition of motor skills, including speech and smiling.     

The effects of chymopapain on prolapsed human intervertebral disc. A clinical and correlative histochemical study

Light and electron microscopy were used to demonstrate extensive matrix degradation in a failed chymopapain-treated disc as compared with an untreated degenerative control disc. Both specimens contained viable cells with patches of degenerative cells. There was a loss of disc height in the chymopapain-treated disc, but no improvement of symptoms. These results illustrated that even in well-circumscribed cases with documented disc protrusion into the spinal canal, the disc space narrowing following injection may aggravate the symptoms of nerve root entrapment, especially if a low-grade lateral recess stenosis is associated with the disc protrusion. The persistence or aggravation of symptoms probably is related to these anatomic considerations. The low level of enzyme activity in the injected area may or may not be correlated with the clinical response to treatment.     

无线通信在医疗领域的应用

本文介绍了无线通信在医院管理、病人移动观察、病例跟踪等方面的应用.     

咽旁间隙原发性肿块流行病学分析

目的：对咽旁间隙原发性肿块进行流行病学分析。方法：对咽旁间隙原发性239例肿块进行统计分析。结果：原发良性肿瘤患病比为61．09％，其中上皮源性肿瘤患病比最高，占19.25％；神经源性肿瘤第二位，占17．57％。原发性恶性肿瘤的患病比为35．15％，其中上皮源性恶性肿瘤的患病比最高，占21.76％；恶性淋巴瘤第2位，占7．95％。炎症的患病比为3．77％，其中淋巴结反应性增生最高。结论：咽旁间隙原发性肿块良性肿瘤的患病比最高，恶性肿瘤次之，炎症居第3位，比例约为17：9：1。     

The use of 19F spectroscopy and diffusion-weighted MRI to evaluate differences in gene-dependent enzyme prodrug therapies.

To evaluate noninvasive measures of gene expression and tumor response in a gene-dependent enzyme prodrug therapy (GDEPT), a bifunctional fusion gene between Saccharomyces cerevisiae cytosine deaminase (CD) and Haemophilus influenzae uracil phosphoribosyltransferase (UPRT) was constructed. CD deaminates 5-fluorocytosine (5FC) to 5-fluorouracil (5FU), and UPRT subsequently converts 5FU to fluorouridine monophosphate, and both of these reactions can be monitored noninvasively in vitro and in vivo using 19F magnetic resonance spectroscopy (MRS). Following transient transfection the CD-UPRT fusion protein exhibited both UPRT and CD enzymatic activities as documented by 19F MRS. In addition, an increase in CD activity and thermal stability was witnessed for the fusion protein compared to native CD. Stable expression of CD-UPRT in 9L glioma cells increased both 5FC and 5FU sensitivity in vitro compared to CD-expressing and wild-type 9L cells. Noninvasive 19F MRS of both CD and UPRT gene function in vivo demonstrated that in animals bearing CD-expressing tumors there was limited conversion of 5FC to 5FU with no measurable accumulation of cytotoxic fluorinated nucleotides (F-nucs). In contrast, CD-UPRT-expressing tumors had increased CD gene activity with a threefold higher intratumoral accumulation of 5FU and significant generation of F-nucs. Finally, CD-UPRT yielded increased efficacy in an orthotopic animal model of high-grade glioma. More importantly, early changes in cellular water mobility, which are felt to reflect cellular death, as measured by diffusion-weighted MRI, were predictive of both durable response and increased animal survival. These results demonstrate the increased efficacy of the CD-UPRT GDEPT compared to CD alone both biochemically and in a preclinical model and validate both 19F MRS and diffusion-weighted MRI as tools to assess gene function and therapeutic efficacy.