冷光源治疗化脓性扁桃体炎32例

[目的 ]观察冷光源治疗化脓性扁桃体炎的疗效 .[方法 ]将 6 4例化脓性扁桃体炎患儿随机分为治疗组与对照组 ,两组均静脉点滴青霉素 15～ 2 0万U/kg ,每日 1次 ,连用 3～ 5d .治疗组加用冷光源治疗 3～ 5d .[结果 ]治疗组疼痛消失时间、退热平均天数、疗程与对照组相比均明显地缩短 .[结论 ]青霉素加用冷光源治疗化脓性扁桃体炎疗效显著     

光疗法治疗新生儿高胆红素血症的疗效观察

[背景 ]观察 2种光疗方法治疗新生儿高胆红素血症的疗效 .[病例报告 ]将 6 0例新生儿高胆红素血症患儿随机分为 2个组 ,分别给予每天 12h间断光疗及 2 4h持续光疗 ,观察其疗效 ,结果示 2种疗法的疗效间无显著性差异 .[讨论 ]12h间断光疗方法值得临床推广应用     

Role of immersion refractometry for investigating laser-induced effects in cells.

The broad background of scattered light observed in spectra of cell suspensions is reduced by factors of up to 20 by immersion refractometry allowing for improved spectroscopic determination of the absorption properties of cells in the 325-820 nm range. Refractive-index matched spectra of E. coli C1a exhibit a set of resonant features near 422, 561, and 582 nm. Exposure wavelengths are chosen based on this spectrum and cell viability is investigated in E. coli suspensions exposed to 350, 400, 422, 440, and 700 nm radiation delivered in nanosecond pulses with total doses from 500 millijoules to 60 Joules. We observe a loss in cell viability for doses greater than 1 Joule at 422 nm and for all doses at other wavelengths; exposures of less than 1 Joule at 422 nm enhance growth. Excluding exposures at wavelengths within the resonant feature, longer wavelengths are less effective at reducing the viability of E. coli C1a. This indicates the occurrence of at least two absorption processes.     

The unmet treatment need for moderate to severe psoriasis: results of a survey and chart review

BACKGROUND: Conventional systemic therapies and phototherapy for psoriasis are limited by safety concerns that may preclude long-term treatment with these agents. OBJECTIVES: To estimate the unmet need for safe and effective treatments for psoriasis. METHODS: A survey was conducted at three psoriasis outpatient clinics in Europe. Male and female patients of any age with psoriasis requiring more than topical treatment were eligible to participate in the survey. Patient data were obtained from patients' answers to a questionnaire as well as by a chart review of each participating patient. The survey questionnaire addressed various aspects of psoriasis, including demographics and disease characteristics, treatment history, pre-existing medical conditions, and patient satisfaction with treatments received. RESULTS: A total of 301 patients participated in the survey, with approximately 100 patients from each centre. Nearly 90% of patients had received at least one systemic therapy or phototherapy for psoriasis, with 39% of patients receiving three or more. Ultraviolet B (UVB), methotrexate, psoralen plus ultraviolet A (PUVA), retinoids and cyclosporin were the most commonly used agents. Inadequate response, reported by patients as no change or worsening of disease with treatment, ranged from 10% to 50%. Contraindications to conventional systemic therapies were reported by 9-22% of patients. A substantial number of patients (42%) were not satisfied with these therapies. CONCLUSIONS: This survey highlights the unmet need for safe and effective therapies for moderate to severe psoriasis.     

Efficacy of "high-intensity" blue-light and "standard" daylight phototherapy for non-haemolytic hyperbilirubinaemia

We report our clinical experience with phototherapy in 3802 infants; 3629 were exposed to "standard" daylight phototherapy and 173 to "high-intensity" blue-light phototherapy. High-intensity blue-light phototherapy was twice as effective as standard daylight phototherapy in decreasing bilirubin concentrations. No failures occurred with high-intensity phototherapy compared with an overall failure rate of 1.84/1000 with daylight lamps; these cases were transferred to high-intensity phototherapy with prompt response. Rebound after cessation of phototherapy was greater in those exposed to high-intensity blue light with a significantly greater number requiring a second exposure. However, the incidence was still low. No third exposure was required in any infant. Nursing of infants under high-intensity blue light was more difficult and inconvenient as was clinical monitoring. The light also caused more stress on the nursing and medical personnel. However, the infants tolerated both types of phototherapy equally well. High-intensity blue-light phototherapy would seem to be the treatment of choice for infants with rapidly increasing or very high bilirubin levels, as well as in those not responding adequately to daylight phototherapy.     

UVN光疗仪治疗带状疱疹的临床分析

目的对UVN光疗仪治疗带状疱疹进行临床观察,寻找治疗带状疱疹的最佳方法。方法对418例患者分别采用UVN光疗仪联合阿昔洛韦及单纯阿昔洛韦治疗,并进行临床治疗的观察研究。结果UVN光疗仪联合阿昔洛韦治疗带状疱疹疗效明显优于单纯阿昔洛韦治疗,P<0.05。结论UVN光疗仪联合阿昔洛韦治疗带状疱疹,疗效可靠,可以阻止疾病炎性细胞浸润,促进患者早日康复。     

2017—2019年河南中医药大学第一附属医院抗肿瘤中药制剂使用情况分析

碳点是一种具有优异荧光性质的新兴纳米材料。相比于传统的有机染料和半导体量子点,碳点具有毒性低和生物相容性好等优点。目前,碳点在分析检测、荧光成像、药物运载等诸多领域有着广泛的应用。鹿茸是一味具有多种药效的传统名贵中药,也是罕见的具备再生能力的哺乳动物器官。鹿茸的生物学特性和药效与其化学成分有着密切联系。简要综述了碳点在荧光检测、荧光成像以及光诊疗方面的应用进展,对碳点应用于鹿茸生物学特性及其化学成分分析研究的可行性进行了探讨。     

Germanium Nanoparticles Prepared by Laser Ablation in Low Pressure Helium and Nitrogen Atmosphere for Biophotonic Applications

Due to particular physico-chemical characteristics and prominent optical properties, nanostructured germanium (Ge) appears as a promising material for biomedical applications, but its use in biological systems has been limited so far due to the difficulty of preparation of Ge nanostructures in a pure, uncontaminated state. Here, we explored the fabrication of Ge nanoparticles (NPs) using methods of pulsed laser ablation in ambient gas (He or He-N₂ mixtures) maintained at low residual pressures (1–5 Torr). We show that the ablated material can be deposited on a substrate (silicon wafer in our case) to form a nanostructured thin film, which can then be ground in ethanol by ultrasound to form a stable suspension of Ge NPs. It was found that these formed NPs have a wide size dispersion, with sizes between a few nm and hundreds of nm, while a subsequent centrifugation step renders possible the selection of one or another NP size fraction. Structural characterization of NPs showed that they are composed of aggregations of Ge crystals, covered by an oxide shell. Solutions of the prepared NPs exhibited largely dominating photoluminescence (PL) around 450 nm, attributed to defects in the germanium oxide shell, while a separated fraction of relatively small (5–10 nm) NPs exhibited a red-shifted PL band around 725 nm under 633 nm excitation, which could be attributed to quantum confinement effects. It was also found that the formed NPs exhibit high absorption in the visible and near-IR spectral ranges and can be strongly heated under photoexcitation in the region of relative tissue transparency, which opens access to phototherapy functionality. Combining imaging and therapy functionalities in the biological transparency window, laser-synthesized Ge NPs present a novel promising object for cancer theranostics.     

Risk of Skin Cancer with Phototherapy in Moderate-to-Severe Psoriasis: An Updated Systematic Review

Phototherapy is a standard treatment for moderate-to-severe psoriasis. However, concern remains regarding the associated cutaneous carcinogenic risk. Our objective is to conduct a systematic review of skin cancer risk for psoriasis patients treated with phototherapy. To achieve our goal, we searched Cochrane, PubMed, and Embase databases. We aimed to evaluate existing literature (from July 1, 2010, to December 31, 2020) on phototherapy for all Fitzpatrick skin phototypes (FSP) which includes 71 articles, and eight articles being categorized in this review. Five studies did not report an increased skin cancer risk with narrowband-ultraviolet blue (UVB) and unspecified UVB for FSP II through VI, with one study not reporting FSP. Three studies did report an increased risk of skin cancer with narrowband-UVB and broadband-UVB for FSP I-VI, with one study also not specifying skin phototypes or UVB phototherapy type. Additionally, a study with psoralen and ultraviolet A with and without narrowband-UVB demonstrated an increased risk of skin cancer in phototypes III and IV. The most commonly reported secondary outcomes with phototherapy were actinic keratosis (123) and solar lentigines (10). Numerous patients were also on additional therapies including methotrexate, acitretin, and biologics. Study limitations include publication bias due to limited number of studies published on this topic in the last ten years along with heterogeneity in reporting. The relationship between phototherapy, psoriasis, and cutaneous oncogenic risk remains contradictory. While phototherapy for psoriasis is an efficacious therapy, further studies are needed to understand the cutaneous oncogenic risk based on FSP to help clinicals tailor treatment recommendations based on skin phototypes.