Value of lying-down nystagmus in the lateralization of horizontal semicircular canal benign paroxysmal positional vertigo.

BACKGROUND: Horizontal canal benign paroxysmal positional vertigo is characterized by horizontal direction-changing nystagmus induced by lateral head turning in supine position. According to Ewald's second law, the direction of head turning that creates a stronger response represents the affected side in geotropic nystagmus and the healthy side in apogeotropic nystagmus. However, it may not always be possible to lateralize the involved ear only by comparing the intensity of the nystagmus. We studied the values of nystagmus induced by position change from sitting to supine in the lateralization of horizontal canal benign paroxysmal positional vertigo. METHODS: A retrospective study of 54 patients who had been diagnosed as having horizontal canal benign paroxysmal positional vertigo at the Dizziness Clinic of Seoul National University Bundang Hospital from May 2003 to February 2004 was performed. The directions of the nystagmus induced by lying down were compared with those determined by Ewald's second law. RESULTS: Of the 54 patients, 32 (20 apogeotropic and 12 geotropic) showed horizontal nystagmus induced by lying down. The nystagmus tended to be ipsilesional in apogeotropic patients (80%) and contralesional in their geotropic counterparts (75%). CONCLUSION: In horizontal canal benign paroxysmal positional vertigo, lying-down nystagmus mostly beats toward the involved ear in the apogeotropic type and directs to the healthy ear in the geotropic type. The direction of lying-down nystagmus may help lateralizing the involved ear in horizontal canal benign paroxysmal positional vertigo.     

长期服抗精神病药病人的隐性运动障碍

目的：评估抗精神病药对迟发性运动障碍（ＴＤ）的掩盖,即隐性运动障碍（ｃｏｖｅｒｔ ｄｙｓｋｉｎｅ－ｓｉａ）状况。方法应用Ｓｉｍｐｓｏｎ运动障碍评分表评定ＴＤ。入组的６９例病人有２３例病人完成了减药之前、停药三周后和再服药四个月后的ＴＤ评定,６９例次检查都给于隶像,并且两个评定者按照录像独立评定ＴＤ是否存在,评定ＴＤ的一致性良好（ＩＣＣ＝０．７５）。结果完成整个调查的２３例病人中,减药前ＴＤ出现率为     

清热抗感冲剂对小鼠IL-2水平影响的实验研究

目的:通过检测清热抗感冲剂对实验性免疫低下小鼠及正常小鼠血清IL-2水平的影响,探讨该冲剂对免疫功能的调节作用.方法:选取昆明种小鼠100只,雌雄各半,其中50只腹腔注射环磷酰胺3mg/0.2mL/只,每天给药1次,连续7天,造成免疫低下小鼠,然后随机分为模型组、中药对照组(银翘解毒片组)、西药对照组(γ-干扰素组)、小剂量组、大剂量组;其余50只随机分为正常空白对照组(即生理盐水组)、中药对照组、西药对照组、小剂量组、大剂量组.上述各组连续用药3天后,处死,采血,离心取血清,采用放免γ测量仪检测IL-2含量.结果:清热抗感冲剂能显著提高正常小鼠和注射环磷酰胺引起的免疫低下小鼠血清中IL-2生成水平(统计学处理P＜0.01).结论:清热抗感冲剂对小鼠的细胞免疫功能有明显的增强作用.     

Vascular endothelial growth factor gene polymorphisms and risk of primary lung cancer.

Angiogenesis is an essential process in the development, growth, and metastasis of malignant tumors including lung cancer. DNA sequence variations in the vascular endothelial growth factor (VEGF) gene may lead to altered VEGF production and/or activity, thereby causing interindividual differences in the susceptibility to lung cancer via their actions on the pathways of tumor angiogenesis. To test this hypothesis, we investigated the potential association between three VEGF polymorphisms (-460T > C, +405C > G, and 936C > T)/haplotypes and the risk of lung cancer in a Korean population. VEGF genotypes were determined in 432 lung cancer patients and 432 healthy controls that were frequency matched for age and sex. VEGF haplotypes were predicted using Bayesian algorithm in the phase program. Compared with the combined +405 CC and CG genotype, the +405 GG genotype found associated with a significantly decreased risk of small cell carcinoma [SCC; adjusted odds ratio (OR), 0.36; 95% confidence interval (95% CI), 0.17-0.78]. The 936 CT genotype and the combined 936 CT and TT genotype were also associated with a significantly decreased risk of SCC compared with the 936 CC genotype (adjusted OR, 0.47; 95% CI, 0.26-0.85 and adjusted OR, 0.44; 95% CI, 0.24-0.80, respectively). Haplotype CGT was associated with a significantly decreased risk of SCC (adjusted OR, 0.39; 95% CI, 0.18-0.87), whereas haplotype TCC conferred a significantly increased risk of SCC (adjusted OR, 1.63; 95% CI, 1.14-2.33). None of the VEGF polymorphisms studied significantly influenced the susceptibility to lung cancer except SCC. However, haplotypes TCT and TGT were significantly associated with the risk of overall lung cancer, respectively (adjusted OR, 0.38; 95% CI, 0.25-0.60 and adjusted OR, 3.94; 95% CI, 2.00-7.76, respectively). These effects of haplotypes TCT and TGT on lung cancer risk were observed in three major histologic types of lung cancer. These results suggest that the VEGF gene may be contribute to an inherited predisposition to lung cancer.     

基于UHPLC-QqQ-MS的四逆散水提液中16种主要化学成分的定量研究

目的 建立同时测定四逆散水提液中16种化学成分含量的方法。方法 应用UHPLC-QqQ-MS技术,采用负离子模式进行扫描,以MRM配对离子方式进行定量。结果 柴胡皂苷A、柴胡皂苷B₂、柴胡皂苷C、柴胡皂苷D、橙皮素、儿茶素、甘草苷、甘草酸、甘草素、绿原酸、没食子酸、芍药苷、芍药内酯苷、异甘草素、异绿原酸A、橙皮苷在负离子模式下响应良好。结论 本实验所建立的同时测定四逆散水提液中16种化学成分含量的分析方法专属性强、快速、灵敏且准确可靠,在完成含量测定的同时又可以准确给出化合物质量数信息,从而达到成分鉴别的效果,该方法可以为四逆散水提液的全面质量控制提供技术支持。      

胸主动脉腔内修复术采用裙边型烟囱支架（Longuette™）的PATENCY临床试验研究结果

背景与目的 烟囱技术是胸主动脉腔内修复术（TEVAR）中重建左锁骨下动脉（LSA）的方法,Ⅰa型内漏是其主要并发症。裙边型烟囱支架（Longuette?）专为烟囱技术设计,用于重建LSA时降低Ⅰa型内漏。为评估Longuette?烟囱支架联合TEVAR治疗累及LSA的Stanford B型主动脉夹层（TBAD）的疗效,笔者开展了前瞻性、多中心临床试验（PATENCY临床试验）。本研究总结PATENCY临床试验的1年结果和经验。方法 2018年10月—2022年3月,全国26家血管外科中心参与PATENCY临床试验,共纳入150例符合标准的TBAD患者。所有患者均在TEVAR术中采用Longuette?烟囱支架重建LSA。评估患者围手术期和术后12个月的临床效果和不良事件,并分析患者术后1年累积生存率、LSA通畅率和无内漏率。结果 患者年龄30~77岁,平均（54.48±11.12）岁,138例（92.0%）患者合并高血压病;急性、亚急性和慢性TBAD分别占74.7%,17.3%和8.0%。124例（82.7%）患者采用全身麻醉。手术成功率为99.33%（149/150）,手术时间（91.67±41.47）min,X线暴露时间（31.36±16.71）min,手术出血量为（71.55±60.40）mL。围手术期内漏发生率为5.33%（8/150）,包括Ⅰ型6例、Ⅱ型1例、Ⅳ型1例;1例（0.67%）患者发生Longuette?烟囱支架急性闭塞,再次实施腔内手术后恢复通畅;1例（0.67%）患者术后发生急性脑梗死;2例（1.33%）患者术后发生逆撕的Stanford A型主动脉夹层,其中1例术后3周死亡。术后30 d死亡2例（1.33%）。142例患者进行了密切随访,随访时间为11.67（5~16）个月。无主动脉支架和Longuette?烟囱支架移位。2例Ⅰ型内漏患者分别于术后6个月和1年进行了再次介入栓塞手术治疗,术后1年随访仍有6例患者有轻微的内漏持续存在,患者TBAD假腔保持稳定,无明显症状,均予以保守治疗。Longuette?烟囱支架内狭窄和闭塞分别发生1例和2例,逆撕的Stanford A型主动脉夹层患者1例,假腔增大,患者均无明显症状,予以保守治疗。无发生脑卒中、截瘫、左上肢缺血等并发症。术后12个月累积生存率、LSA通畅率、无内漏率分别为97.96%、97.96%和91.91%。结论 采用Longuette?烟囱支架在TBAD腔内治疗中重建LSA简便、安全、有效,其能够有效降低围手术期Ⅰa型内漏的发生率,为微创治疗主动脉弓部病变提供新的治疗方式。     

Malignant transformation of nevus sebaceous to basal-cell carcinoma: Case series,literature review,and management algorithm

Nevus sebaceous (NS) is a common congenital hamartoma of the skin composed predominantly of sebaceous glands. Although most NS are benign skin tumors, malignant transformations have been reported. There is still controversy about the lifetime risk of malignant degeneration and precise surgical criteria. This study reports cases of malignant degeneration and suggests a surgical treatment algorithm. The medical records of patients with basal-cell carcinoma (BCC) arising from NS between January 2001 and January 2021 were retrospectively reviewed. Patient demographics including lesion location, and tumor size were investigated. The symptoms, histological findings before and after excision, complications, and recurrence during 2-year follow-up periods were investigated. Ten patients were identified with BCC arising from NS lesions. All patients were female and the mean age was 52.11 years. All patients complained of sudden morphological changes, the most common type being rapid color changes. Two cases had histological findings that showed a miss-match between punch biopsy and excisional biopsy results. No recurrence was detected 2 years after surgeries in any patients. Cases after third stage, especially in over 40 years who report morphologic changes, should undergo total surgical excision as the first approach, with strong suspicion of malignant degeneration.     

Surgical approaches to correct corneal astigmatism at time of cataract surgery: a mini-review

Among refractive errors, astigmatism is the most common optical aberration, where refraction changes in different meridians of the eye. It causes blurred vision at any distance and includes corneal, lenticular, and retinal astigmatism. Cataract surgery used to cause a progressive increase in the pre-exisiting corneal astigmatism because of creating a surgically induced astigmatism, for example, a large size surgery incision. The development of surgical techniques during last decades has made cataract surgery interchange to treat preoperative corneal astigmatism at time of surgery. Nowadays, three surgical approaches can be used. By placing a sutureless clear corneal incision on the steep meridian of the cornea, a preoperative corneal astigmatism less than 1.0 D can be corrected. Single or paired peripheral corneal relaxing incisions (PCRIs) provide 1.0-3.0 D corneal astigmatism correction. PCRIs are typically used for treating 1.0-1.5 D of regular corneal astigmatism, if more than 2.0 D, the risk of overcorrection and irregular astigmatism is increased. When toric intraocular lenses (IOLs) are unavailable in markets, PCRIs are still a reasonable option for patients with up to 3.0 D of pre-existing corneal astigmatism. Toric IOLs implantation can correct 1.0-4.5 D of corneal astigmatism. Several IOLs are approved to correct a high degree of corneal astigmatism with cylinder power up to 12.0 D. These approaches can be used alone or in combination.     

Early changes in corneal densitometry after FS-LASIK combined with accelerated corneal cross-linking for correction of high myopia

AIM: To observe the effects of femtosecond laser-assisted excimer laser in situ keratomileusis combined with accelerated corneal cross-linking (FS-LASIK Xtra) on corneal densitometry after correcting for high myopia. METHODS: In this prospectively study, 130 patients underwent FS-LASIK or FS-LASIK Xtra for high myopia. Their right eyes were selected for inclusion in the study, of which 65 cases of 65 eyes in the FS-LASIK group, 65 patients with 65 eyes in the FS-LASIK Xtra group. Patients were evaluated for corneal densitometry at 1, 3, and 6mo postoperatively using Pentacam Scheimpflug imaging. RESULTS: Preoperative differences in corneal densitometry between the FS-LASIK and FS-LASIK Xtra groups in different ranges were not statistically significant (P>0.05). Layer-by-layer analysis revealed statistically significant differences in the anterior (120 μm), central, and total layer corneal densitometry between the FS-LASIK and FS-LASIK Xtra groups at 1 and 3mo postoperatively (all P<0.05), the FS-LASIK Xtra group is higher than that of the FS-LASIK group. Analysis of different diameter ranges showed statistically significant differences between the FS-LASIK group and the FS-LASIK Xtra group at 1mo postoperatively in the ranges of 0–2, 2–6, and 6–10 mm (both P<0.05); At 3mo postoperatively, the FS-LASIK Xtra group is higher than that of the FS-LASIK group in the ranges of 0–2 and 2–6 mm (P<0.05). At 6mo postoperatively, there were no statistically significant differences in corneal densitometry between the FS-LASIK group and the FS-LASIK Xtra group in different diameter ranges (all P>0.05). CONCLUSION: There is an increase in internal corneal densitometry during the early postoperative period after FS-LASIK Xtra for correction of high myopia. However, the densitometry values decreased to the level of conventional FS-LASIK at 6mo after surgery, with the most significant changes observed in the superficial central zone.     

慢性乙型肝炎组织中肝前体细胞的免疫组化特征

目的研究肝前体细胞（hepatic progenitor cells,HPCs）、小管样反应、中间型肝细胞在慢性乙型肝炎组织中的分布特征和数量变化,以及与肝细胞再生之间的可能联系。方法对42例慢性乙型肝炎组织行常规病理HE染色,按炎症活动度（G）分为轻、中、重三度,免疫组织化学方法观察肝胆细胞标记（AFP、GST-π、CK7、CK19）和造血干细胞标记（c-kit、CD34）的表达,并以Ki-67标记增殖的肝细胞,用CK7／CK19作为标记物对符合定义的HPCs、中间型肝细胞进行计数,小管样反应程度的判定利用彩色病理图象分析系统。结果慢性乙型肝炎的早期阶段即存在HPCs的活化和小管样反应,其数量随着炎症活动度的增加而增加,均表达CK7、CK19、GST-π和AFP,肝细胞增殖指数在轻、中度肝炎中逐渐增加,重度肝炎、肝硬化患者增殖的肝细胞数下降,而中间型肝细胞数量显著增加。小管样反应面积百分比与HPCs数目正相关（r=0．739,P〈0．05）,中间型肝细胞数目与HPCs数目正相关（r=0．614,P〈0．05）。结论慢性乙型肝炎中不仅有成熟肝细胞增殖,也存在肝前体细胞活化和分化,可能参与肝脏损伤后的再生修复。