New Device For Measurement Research Articles

Validation of new device with pneumatic sensor for measurement and recording of arterial blood pressure

This paper presents construction, operating principle and initial study of new device for measurement and recording of arterial blood pressure, created at Wroclaw University of Science and Technology. This device is equipped with a pneumatic pressure sensor based on the pneumatic nozzle flapper amplifier principle. During the measurement sensor is applied to the patient’s body, where the pulse is easily palpable. After that, sensor is gradually pressed against to the artery, in order to record peak amplitude. Maximum value of this amplitude corresponds to the real blood pressure waveform. This device was validated according to „International Protocol revision 2010 for the validation of blood pressure measuring devices in adults”.

斜視手術中の回旋偏位測定の試み

斜視手術中の回旋偏位測定の試み

Erratum to: Evaluation of a new device for measurement of hemoglobin A1c for Japanese subjects

Erratum to: Evaluation of a new device for measurement of hemoglobin A1c for Japanese subjects

Evaluation of a new device for measurement of hemoglobin A1c for Japanese subjects

Aim The accuracy of HbA1c values measured by use of a new portable device (A1CNow+) was evaluated by comparison with values measured by high-performance liquid chromatography (HPLC).

High-Precision Gas Sensor Based on Photonic Bandgap Fiber Cell

As one of applications for Microstructured Optical Fiber, a new device for measurement of low gas concentration was designed. In the developed system the Photonic Bandgap Fiber (PBGF) was used as a gas cell. Proposed technique allowed reducing gas sample volume to 0.01 cc. The gas flow inside core of fiber was simulated and result was confirmed experimentally. During the experimental work several types of fibers of various parameters were specially designed, produced and used. Core diameters ranged from 10.9 μm to 700 μm. Various cutting techniques for fibers such as using the fiber cleaver, Focused Ion Beam and Cross Section Polisher were investigated.

Low Concentration Gas Measurement Using Photonic Bandgap Fiber Cell Sensor

Among few existing applications of Microstructured Optical Fibers, a new device for measurement of low gas concentration was designed. Developed set-up based on a Photonic Bandgap Fiber (PBGF), which was used as a gas cell. Proposed technique allowed reducing gas sample volume to 0.01 cc. The gas flow inside core of fiber was simulated and result was confirmed experimentally. During the experimental work several types of fibers of various parameters were specially designed, produced and used. Core diameters ranged from 10.9 μm to 700 μm. Various cutting techniques for fibers were investigated.

Development of a simple device for measurement of rotational knee laxity

The goal of this study was to develop a new device for the measurement of rotational knee laxity and to measure intra-observer and inter-observer reliability in a cadaveric study. An array of established tools was utilized to design the device with a basis that consists of an Aircast Foam Walkertrade mark boot. A load cell was attached to the boot with a handle bar for application of moments about the knee. An electromagnetic tracking system was used to record the motion of the tibia with respect to the femur. The total arc of motion ranged from 23 degrees at full extension to 46 degrees at 90 degrees of knee flexion. The intra-tester ICCs ranged from 0.94 to 0.99. The ICC for inter-tester reliability ranged from 0.95 to 0.99. In summary, the new device for measurement of rotational knee laxity is simple, reliable, and can be used in a non-invasive fashion in the office or surgical suite document clinical outcome in terms of rotational knee laxity.

The sphinctometer: A new device for measurement of lower oesophageal sphincter function

Current evidence suggests that lower oesophageal sphincter (LOS) competence depends upon both pressure and length. Existing devices can measure length and pressure, but not simultaneously. This methodological problem is a fundamental drawback to understanding LOS function and its role in oesophageal disease. A 'sphinctometer' has been developed, consisting of an oil-filled 3-mm diameter Silastic chamber, 6 cm in length, incorporating a pressure microtransducer designed to provide an integrated pressure reading as a function of length. Its performance has been tested in vitro using human cadaver oesophagus in a specially constructed chamber in which sphincter length and pressure can be varied independently. Comparisons were made with a conventional pull-through technique. Sphinctometer response was linear throughout the LOS pressure range of 0 to 50 mmHg at a fixed LOS length (RS = 0.99; P less than 0.001). Sphinctometer response was also linear at fixed LOS pressure for sphincter lengths from 1 to 6 cm (RS = 0.99; P less than 0.001). This device thus appeared suitable for monitoring function of the human LOS, and has subsequently been successfully incorporated into an ambulatory system for patient use.

Evaluation of SET–A New Device for the Measurement of Pain Perception in Comparison to Standard Measures of Diabetic Neuropathy

Early detection of sensory impairment and loss of protective pain sensation is of major importance for the prevention of neuropathic foot ulceration. The aim of our study was to evaluate a new handheld device (SET, a prototype developed by Dr. W. Henniges, Zülpich, Germany) for measurement of pain perception, in comparison with established methods for diagnosis of diabetic neuropathy. Sixty-one patients with diabetes mellitus (13 type 1, 48 type 2; 42 men, 19 women; mean +/- SD age 61.6 +/- 11.6 years) received measurement of pain perception threshold using the new SET device and a measurement of light touch sensation, temperature sensation, and vibration sensation by the use of standard clinical devices. In addition, warm, cold, heat pain and vibration perception thresholds were determined by the use of a computer-based peltier thermode and a vibration stimulator (TSA 2001, Medoc, Ramat Yishai, Israel). Using the new SET device, patients with sensory impairment showed significantly elevated pain perception thresholds at the dorsum of the foot (P < 0.001), while only a trend towards higher measurements could be observed at the plantar aspect of the foot. A significant correlation could be observed between plantar and dorsal measuring sites (r = 0.78, P < 0.0001) and between both feet (r = 0.85, P < 0.0001). Compared with other qualities of sensory dysfunction, pain perception measurement with the SET device provided the highest sensitivity (pain = 0.82; vibration = 0.61; temperature = 0.42; light touch = 0.11). Measurement of pain perception threshold using the SET device is an easy and reliable method for identifying patients with impaired small nerve fiber function.

A new device for measurement of the thermal conductivity of fur and blubber

1. 1. A new and simple device for measurements of thermal conductivity of fur and blubber is described. 2. 2. The device measures temperature differences across the sample and across a polyethylene plate with known conductivity which is placed in series with the sample. 3. 3. The conductivity of the polyethylene was determined from the steady state temperature difference and heat flux through the wall of a polyethylene pipe with a central heat source. 4. 4. The accuracy of the device is ±4.0%. 5. 5. The thermal conductivity of harp seal ( Phoca groenlandica) and minke whale ( Balaenoptera acutorostrata) blubber, as determined by use of this device, is very close to previously reported values.

A new device for measurement and control of gas production by bench scale anaerobic digesters

On the basis of an analysis, in terms of desirable characteristics and main sources of error, of existing apparatus for measuring biogas production by laboratory anaerobic digesters, we have developed a new device that is precise, inexpensive, easily constructed and capable of functioning autonomously for long periods. A slightly costlier version suitable for use in automatic control systems is also described.

The Biplane Goniometer. A new device for measurement of ankle dorsiflexion

The Biplane Goniometer. A new device for measurement of ankle dorsiflexion

Étude des propriétés de couches minces de sélénium hexagonal dopées au chlore

Thin films of chlorine-doped selenium were characterized using X-rays, scanning electron microscopy and secondary ion mass spectrometry (SIMS) studies. The conductivity, Hall effect and thermoelectric power variations were measured vs. temperature. A new device for measurement of the thermoelectric power of resistive samples is described. SIMS analysis showed that chlorine was not uniformly distributed in the films. The crystallite size was found to increase when the chlorine concentration decreased and/or when the substrate temperature during deposition increased. The films being polycrystalline, electrical measurements show that only a small fraction of chlorine enters the crystallite and increases the acceptor concentration, while the excess chlorine remains at the grain boundaries.

A new device for measurement of pulmonary pressure-volume curves in patients on mechanical ventilation.

Measurement of total (lung plus chest wall) pulmonary compliance is routinely obtained in mechanically ventilated patients by dividing the tidal volume (VT) by the airway pressure (Paw) gradient from end-inspiration to end-expiration. In order to obtain the pressure-volume (P-V) tracing during inspiration, we developed a method using a continuous and slow (1.7 L/min) oxygen inflow. When gas flow is kept constant, changes in lung volume are proportional to time and do not require direct measurement. In 22 patients, P-V curves traced using the continuous-flow method were identical to those obtained from the syringe method. The advantages of the inflow method are simplicity, reproducibility, and better visualization of the initial part of P-V curve.

Computherm. A new device for measurement of coronary blood flow using the continuous thermodilution technique.

A new device for an automatic determination of coronary sinus blood flow using the thermodilution technique is presented. The measuring equipment consists of four main parts; a thermal dilution-catheter with two signal amplifiers of analogue type, an analogue/digital converter controlled by a microcomputer system, a pump for the control of the rate of injection flow and a control panel and display. The device has been tested in a model test with flow levels between 75 and 200 ml/min. The error between a number of measurements with all parameters unchanged except minor variations in temperatures was less than 5 per cent.

A new device for measurement of polarization and field intensity of low‐latitude whistlers

A new device for measurement of polarization and field intensity of low‐latitude whistlers

New device for measurement of ocular countertorsion reflex.

New device for measurement of ocular countertorsion reflex.