They provide very good repeatability and their calibration remains unaffected. In Kenya, Esamai [12] showed that in 14 of a sample of 56 children there was no temperature reading difference between the GMT and LCT, in 12 the chemical dot thermometers recorded higher readings than the GMT by an average of 0.34°C and in 30 children the GMT recorded higher readings than the LCT by an average of 0.67°C. In resource-rich countries, they have to a large extent been replaced, at least in hospital settings, by other instruments such as the tympanic membrane thermometer. It has large bulb size. Calculator- it’s Definition, Types, Advantages & Disadvantages Advantages of a Digital Thermometer 2. Advantages and Disadvantages of Different Types of Thermometers Medically reviewed by Debra Sullivan, Ph.D., MSN, R.N., CNE, COI — Written by Corey Whelan on December 15, 2020 Types What is A Thermometer A thermometer is a device to measure temperature. The disadvantages includes, it is fragile and the fluid contained inside the tube may be toxic. A questionnaire was then given to the nurses at the end of data collection to gauge their views of the new LCTs. A novel thioctic acid-carbon dots fluorescence sensor for the detection of Hg. The reading has to be done immediately on removal from the patient since the temperature reading reverts back to ambient temperature once removed. A clinical appraisal, Comparing liquid crystal thermometer readings and mercury thermometer readings of infants and small children in a traditional African setting. Patients with temperature readings by GMT outside the range of the NextempR and TraxitR thermometers (<35.5°C and >40.4°C) were to be excluded. Agreement between Nextemp and mercury thermometer. The full and inter-quartile ranges of the doctor's measurements are smaller than those of the nurses, and there are several outliers in the nurses’ recordings. Your email address will not be published. GMTs are, however, not without their problems. Advantages and Disadvantages of Infrared Thermometers. The sensor consists of a matrix of dot-like indentations, each less than 1 mm in diameter, arranged in rows of five. The sensors convert the temperature into numeric value, ie, numbers that are marked on the side of the mercury or just digital representation of the numbers. Low sensitivity occurs in RTD. The results of our study showed that the differences recorded by the single doctor were more closely aligned to the GMT readings that were those of the nurses. For full access to this pdf, sign in to an existing account, or purchase an annual subscription. The picture shows an example of a liquid … The thread of the thermometer is quite fragile, and when it breaks it is nearly impossible to rejoin. Our own study supports the conclusion that when used correctly, both NexttempR and TraxitR compare very closely with GMT. In medical applications, liquid crystal thermometers may be used to read body temperature by placing them against the forehead. The advantages of these types of thermometers is that they are cheap, easy to read, can be submerged in liquids, require very little maintenance and are reliable. The mean differences were 0.004°C (−0.043°C to 0.050°C) and −0.069°C (−0.121°C to −0.017°C). We will be considering the working properties, characteristics, application and advantages/ disadvantages of the following smart and modern materials; thermo-ceramics, shape memory alloys (SMA), reactive glass, liquid crystal displays (LCD), photo-chromic materials, thermo-chromic materials, quantum tunnelling composites. http://www.theaudiopedia.com What is LIQUID CRYSTAL THERMOMETER? Following instruction in the use of the new LCTs, a group of twelve nurses also took the three temperature readings from each of a further 100 patients. TraxitR is designed to adhere to the patient's skin, allowing continuous monitoring of temperature [19]. From the viewing angle, the color and contrast not consistent. Most of the flat panel computers are made of Liquid Crystal Display. They are unable to read temperatures <35.5°C and >40.4°C. Alcohol (also called spirit-filled) thermometers are inexpensive but they also break very easily. Bland Altman plots of the mean temperature differences between the NextempR and GMT and TraxitR and GMT are shown in Figs 3 and 4. Your comment will be reviewed and published at the journal's discretion. 23963. Those that did answer, however, were favourably impressed. Posted By: davisblog_admin March 24, 2014. Advantages of Infrared thermometers. 1 Answers. The dots are covered with a multilayer transparent plastic film to seal in the chemicals. In effect each indicator dot is a miniature independent thermometer. Compact, lightweight digital thermometers that include a stem or probe attachment for contact … The authors would like to thank the nursing staff for helping in collecting the data and evaluating the use of the new thermometers, Professor Trevor Duke for helpful comments and suggestions, and Dr John Stace for the original idea and for donating the thermometers. Relatively few studies have assessed their use to detect febrile children in such situations. The mixture in each dot is formulated to melt and change colour from green to black at a specific temperature. LCTs have some disadvantages compared with GMTs. We conclude that the LCT such as NextempR and TraxitR devices can have a significant place in Hospital and clinic practice in resource-poor environments. Agreement between Traxit and mercury thermometer. This is not surprising given that there were 12 nurses involved. When used on an individual and disposable basis they are expensive, but when used repeatedly, as in our study, they are eminently affordable. Liquid Crystal Thermometers. The 50 dots represent temperature increments of 0.1°C over the range 35.5–40.4°C. Search for other works by this author on: Evaluation of clinical thermometers for accuracy and reliability, Acute mercury vapour poisoning in an infant, Unreliability of the infrared tympanic thermometer in clinical practice: a comparative study with oral mercury and oral electronic thermometers, Lack of agreement between tympanic and oral temperature measurement in adult hospitalized patients, A difference of 5 degrees Celcius between ear and rectal temperatures in a febrile patient, Screening for fever in an adult emergency department: oral vs tympanic thermometry, Use of tympanic thermometers to screen for fever in patients in a paediatric emergency department, Reliability of infrared tympanic thermometry in the detection of rectal fever in children, Continuous monitoring of skin temperature using a liquid crystal thermometer during anaesthesia, An evaluation of liquid-crystal thermometry as a screening device for interoperative hyperthermia, Comparison of disposable and glass mercury thermometers, Comparison of standard mercury thermometer and the liquid crystal device skin contact thermometer in febrile children at Eldoret District Hospital, An evaluation of body temperature measurement, The relative accuracy of mercury Tempa-DOT, Liquid crystal forehead temperature strips. Below are some of the advantages and disadvantages associated with thermometric liquids. Implications for community-based health, Liquid Crystal Thermometry for the detection of neonatal hypothermia in Nepal, Neonatal hypothermia detection by ThermoSpot, Statistical methods for assessing agreement between two methods of clinical assessment, Nextemp thermometer can be used interchangeably with tympanic or mercury thermometer for emergency department use, Evaluation of a new, wearable, precision phase-change thermometer in neonates, © The Author [2009]. ALSO READ. Although the NextempR is sold either as a covered disposable or an uncovered reusable instrument for measuring oral temperatures, it is robust, with a claimed 5-year shelf life and can be used for measuring axillary temperature. It is relatively bright but not suitable for very brightly environments. The NextempR thermometer is a flexible polystyrene plastic strip, 9.1 cm long with a temperature sensor at one end of the device. The liquid crystal thermometer allows measuring the temperature of a solid object surface, and the human body, without providing a corresponding electrical signal, making use of special material ... and expensive price. The sensitivities and positive predictive values of the FeverScanR and TempDOTR devices to correctly identify febrile children were 89% and 57% for the former and 92% and 86% for the latter. For Permissions, please email: journals.permissions@oxfordjournals.org. In spite of prompting, only 6 of the 12 nurses completed questionnaires. Eight months after the start of the study, the mean difference between GMT and one of the NextempR thermometers used at the start of the study was −0.15°C (−0.002°C to −0.30°C) for 10 recordings by the same doctor. Unlike electrical thermometers, they do not necessitate power supply or batteries for charging. 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