INDIRECT MEASUREMENT OF SYSTOLIC BLOOD PRESSURE IN THE NEWBORN A New, Reliable Method

ABSTRACT: Shaw, A., Maxted, K. J. and Mcdonald, T. H. (Department of Clinical Physics and Bio-Engineering, Glasgow, and Falkirk and District Royal Infirmary, Falkik, Scotland). Indirect measurement of systolic blood pressure in the newborn. A new reliable method. Acta Paediatr Scand, 63: 601, 1974.—The accurate measurement of systolic blood pressure in the newborn by non-invasive means has, in the past, proved difficult. A new reliable method has been developed which employs a rigid, hinged cuff to occlude the limb, and a thermistor circuit to detect the pulse. The performance of the device is compared with measurements obtained by direct arterial catheterization and its use in the routine clinical situation is evaluated. This device is significantly more convenient and reliable than present methods. It is small, self-contained and relatively inexpensive to produce.     

热疗过程中体温监测器的研制

目的研制一种主要用于热疗过程中的体温监测器,可提供实时体温显示,并根据设置的参考体温值及时发出报警,为安全热疗提供保障。方法采用温度传感器检测体温,通过对信号进行线性处理和放大,经模数转换和单片机AT89C52处理,最终通过液晶对体温进行显示。结果该温监测器能够在误差小于±1%的条件下对热疗过程中的体温进行测量。结论该体温监测器能够实时、连续地对热疗过程中的体温进行准确监测。     

Short communication: Positioning of temperature measurement points using multiplanar computed tomography

A method is described for the use of computed tomography and multiplanar reconstruction to depict in single images the full course of obliquely running thermometry catheters. In 14 patients given thermoradiotherapy for locally advanced breast carcinoma, reformatted images of the full catheter course were obtained for all 98 catheters so far tested. The main clinical advantage of this time-consuming procedure was the ability to determine the localization within the catheters of individual temperature measurement points of multipoint thermistor probes. It was also possible to study the localization of the measurement points in relation to the tumour margins.     

非接触式红外遥感体温计的设计和实现

讨论红外遥感体温计的基本原理，并论证了用之体温计的可行性。在此基础上，我们给出了使用红外传感器来实现体温计的电路原理图和程序流程。     

应用酶热生物分析仪快速测量血糖的研究分析

目的通过酶热生物分析仪与检验科全自动生化分析仪血糖检测结果的对比,验证此仪器的精准度。长远目的在于根据热传感器的特性开发一种半连续的检测葡萄糖浓度的床旁监测系统。方法以实验室大型生化分析仪作对比,应用单通道酶热生物分析仪对海军总医院神经外科150例患者进行全血的快速血糖测定。结果两种检测方法在检测血糖中差异无显著性(P>0.05),应用单通道酶热生物分析仪快速测定血糖方法可靠,此检测方法与临床检测结果基本保持一致。每次测量时间约3 min。可以连续测量45 d而酶的活性不变。结论酶热生物分析仪可以用来监测血糖指标及评估治疗效能,并且有能力在不需要任何预处理的全血中实施快速的动态检测。     

酸奶中β-内酰胺酶的快速检测方法

目的建立酶热生物传感器法用于快速检测酸奶中β-内酰胺酶。方法酸奶样品于4℃下5000r／min离心10min,取中间层清液与一定量青霉素G混合,室温震荡反应3h,使样品中β-内酰胺酶充分酶解加入的青霉素G底物,然后直接通过酶热生物传感器进行分析。酶热生物传感器中装备有专一性酶柱,能够特异性地与青霉素G进行反应,并对其含量进行测定。根据震荡反应前后酸奶样品中青霉素G含量的变化,可以推算出酸奶样品中β-内酰胺酶的活性。结果该方法样品检出限为2U／ml,定量限为4U／ml;线性范围4～20U／ml,3个加标水平（6U／ml、10U／ml、18U／m1）的平均回收率在85％～110％之间,相对标准偏差小于20％。结论本文所建立的酶热生物传感器法能够快速测定酸奶中B一内酰胺酶活性,与传统微生物法相比,操作简单、仪器可便携,显著节约了检测时间和成本,是传统方法的有力补充,更适合于大规模样品筛查和现场检测。     

固定化酶管式热敏传感器的数学模型及其应用——发酵产物浓度的测定

利用微元段内的物料与热量平衡,对固定化酶管式热敏传慈器进行了考察,建立了用联立双曲型偏微分方程组描述的数学模型。该模型用于具体的发酵产物浓度测试,所得出的输入浓度与输出温差之间的关系具有Monod方程的形式,其度化趋势较好地反映了实测结果。     

用酶热敏法测定青霉素浓度

采用固定化酶热敏装置,对青霉素的浓度进行测量,此法适合于在线分析和控制。还研究了此酶反应的动力学,获得了固定化管式酶反应器的动力学参数。     

Improved detection of obstructive events in childhood sleep apnoea with the use of the nasal cannula and the differentiated sum signal

The efficacy of the nasobuccal thermistor (NT) was compared with the nasal pressure cannula (NC) and the calibrated, time-differentiated respiratory inductance plethysmography sum signal (DS) in the detection of obstructive events in children during polysomnography (PSG). The overnight PSG of 20 consecutive referrals were selected for analysis. Obstructive events were scored in each study three times by one operator using a blinded procedure whereby either the NT, the NC or the DS was visible. The standard PSG channels were also visible. SPSS software was used for statistical analysis. Twenty patients aged 5 weeks to 16 years were studied. Agreement in obstructive apnoea-hypopnoea index (OAHI) was highest between the NT and NC, and the NC and DS. The NC signal was significantly more likely to be uninterpretable than the NT (P = 0.02) and this did not correlate with age. Event detection by the NT was significantly improved by the addition of either the NC (P = 0.01) or the DS (P = 0.001), while the NC stood alone unless the DS was added (P = 0.02). There was no significant difference in OAHI by the NC versus the DS. The NC detected significantly more OA than the NT or the DS (P = 0.04), while the DS trended towards detecting more OH. There was no significant difference in OAHI between any combination pair. The nasal cannula and differentiated sum signal perform better as measures of paediatric airflow than the NT. To optimize the detection of obstructive events in children we recommend using at least one, if not both these methods in paediatric sleep laboratories.     

Entrapment of a nasopharyngeal temperature probe: an unusual complication during an apparently uneventful elective revision laparoscopic nissen fundoplication

We report the first case of nasopharyngeal temperature probe entrapment during an apparently uneventful elective revision laparoscopic Nissen fundoplication that precipitated a continuous quality improvement project at our institution. We describe changes in our clinical practice that resulted from this occurrence and envision these modifications will have a positive influence on patient care.