... Infrared … ALSO READ. The GMT has been considered to be more accurate than other thermometers [1] and, since its development in 1866 by Sir Thomas Allbutt, it has been the gold standard for body temperature measurement against which other devices are judged. Posted By: davisblog_admin March 24, 2014. The mixture in each dot is formulated to melt and change colour from green to black at a specific temperature. It does not affect by the magnetic fields. They are fragile, and there is a potential danger of mercury-vapour toxicity following breakage [2], and injury to skin and mucous membranes. A similar result was obtained when one of the NextempR thermometers used in the initial study was compared with GMT on a small sample of patients by the doctor 8 months later. When used on an individual and disposable basis they are expensive, but when used repeatedly, as in our study, they are eminently affordable. Stem thermometers. The GMT and NextempR were placed in the axilla and left in place for 2–3 min before a reading was taken. This prospective study was conducted between April and August 2007 in the paediatric wards of the Port Moresby General Hospital, the only tertiary referral hospital in Papua New Guinea. It consumed a lot of electricity which produce a lot of heat. For full access to this pdf, sign in to an existing account, or purchase an annual subscription. It is relatively bright but not suitable for very brightly environments. Boxplot of temperature difference between GMT and Nextemp. 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. http://www.theaudiopedia.com What is LIQUID CRYSTAL THERMOMETER? The picture shows an example of a liquid … Agreement between Traxit and mercury thermometer. The importance of lasers in communication and … In a study comparing the use of NextempR with GMT and Tympanic thermometers in adults, Rajee and Sultana [21] showed that the NextempR thermometer agreed with the GMT within −0.6°C to 0.5°C and concluded that it can be used interchangeably with current mercury and tympanic thermometers. Relatively few studies have assessed their use to detect febrile children in such situations. Thermometers are primarily used in the medical, … Thank you for submitting a comment on this article. Compact, lightweight digital thermometers that include a stem or probe attachment for contact … The age of the participants ranged between <1 and 13 years of age with a median age of 2 years and an inter-quartile range of 1–3 years. Following are the major advantages associated with the use of liquid-in-glass thermometers: They are comparatively cheaper than other temperature … ... without puncturing the meat and allowing liquid and steam to escape . What does LIQUID CRYSTAL THERMOMETER mean? ... Below we have organised a simple list of some of the most popular types of thermometers along with their advantages and disadvantages over other varieties. Advantages of a Digital Thermometer 2. In the LIG thermometer the thermally sensitive element is a liquid contained in a graduated glass envelope. It has large bulb size. They were initially trialed in anaesthesia [9,10], but the development of easy-to-use devices led to their more widespread use in the 1980s and 1990s. Cross-linked sulfydryl-functionalized graphene oxide as ultra-high capacity adsorbent for high selectivity and ppb level removal of mercury from water under wide pH range. LCTs have some disadvantages compared with GMTs. I actually thought that the … It shows clearly that NextempR and TransitR can be used interchangeably with GMT in a Papua New Guinean hospital setting. Compared with inorganic and liquid crystal types, the organic thermochromic compounds have more advantages in terms of more colour categories, wider range of colour-changed … Your email address will not be published. Most of the flat panel computers are made of Liquid Crystal Display. Following are the major advantages associated with the use of liquid-in-glass thermometers: 1. Benefits of indoor digital thermometers - compact and cheap cost, and shortcomings - low descriptiveness and lack of functionality. Liquids used in glass thermometers. It is relatively bright but not suitable for very brightly environments. Liquid-In-Glass Thermometers . Further interpretation of the strengthening effect of curdlan on frozen cooked noodles quality during frozen storage: Studies on water state and properties. High thermal conductivity, high sensitivity to temperature, and good visibility make mercury the best for liquid-filled Thermometers. 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. LCTs have the potential to fill the void. In resource-poor environments they are both impractical and unaffordable. ... Hey, Thank you for sharing your expertise on Infrared Thermometer. The sensor consists of a matrix of dot-like indentations, each less than 1 mm in diameter, arranged in rows of five. 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. liquid in glass thermometer advantages and disadvantages. ... because of the low boiling point of the thermometer’s liquid contents. We compared the temperatures recorded, in febrile children admitted to a children's ward at Port Moresby General Hospital, by a doctor and by a group of nurses using glass mercury thermometers (GMT) and liquid crystal thermometers (LCT, NextempR and TraxitR). The aim of this study, therefore, was to assess the practicality of using NextempR and TraxitR LCTs in the context of a busy paediatric ward in a resource-poor environment. 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. Effect of organic matter concentration and characteristics on mercury mobilization and methylmercury production at an abandoned mine site. The mean difference (with 95% confidence intervals) in temperature between GMT and NextempR in the case of the doctor's readings was −0.12°C (−0.16°C to −0.08°C) and in the case of the nurses it was 0.12°C (0.04–0.20°C). 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. In high temperature environments there is loss of contrast. NextempR is marketed as a disposable or reusable thermometer primarily to be used for taking oral temperatures on a single patient. The thread of the thermometer is quite fragile, and when it breaks it is nearly impossible to rejoin. None of the children had a temperature recorded by GMT that was outside the range of LCTs (35.5–40.4°C). Alcohol (also called spirit-filled) thermometers are inexpensive but they also break very easily. It is cheap, portable and convenient. Those that did so listed ease of use, reusability, accuracy, safety and indestructibility as attributes. It is very compact, thin, and light CRT displays. Thermometers are used to measure temperature and convert this into a readable format such as Celsius, Fahrenheit or Kelvin. The individual dots on the NextempR are small, and good light and good eyesight is required to read the device, although this is also required for GMT. 23963. When it comes to thermometers, like most things, you get what you pay for. Below are some of the advantages and disadvantages associated with thermometric liquids.Advantages of mercury as a thermometric liquid.-It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly.-It does not wet (cling to the sides of) the tube.-It has a high boiling point -It expands uniformly (linear expansion) and responds quickly to temperature … Facility-Based Newborn Deaths at a Referral Tertiary Hospital in North-Central Nigeria during the Sustainable Development Goal Era: A Retrospective Cohort Analysis, Comparing Treatment Outcomes between Confirmed and Non-Confirmed Childhood TB Cases: Study from a Major Tertiary Center in Thailand, Clinical Usefulness of Acute-Phase Markers in Distinguishing between PFAPA and Other Exudative Tonsillitis Causes: A Methodological Study, Receive exclusive offers and updates from Oxford Academic, The Factors that have a Role in Variability for Temperature, Leave against Medical Advice in Children: Rural Indian Perspective, Altered Mental Status Among Febrile Hospitalized HIV-Infected Children Aged 0–59 Months in Mozambique, Multi-System Inflammatory Syndrome in a Child Mimicking Kawasaki Disease. In spite of prompting, only 6 of the 12 nurses completed questionnaires. ... January 10, 2021 In Uncategorized By. In a study of 29 neonates, McKenzie [22] showed that the mean (SD) temperature difference between the GMT and the TraxitR thermometer was 0.04°C (0.22°C) on a first reading and −0.11°C (0.17°C) on a second reading. Based on these differences the NextempR thermometer performed slightly better than the TraxitR thermometer in comparison to the GMT. Liquid Crystal Thermometers. Health risks of laser & Safety precautions to avoid biological hazards of laser radiation. The big advantage of the GMT is that it is cheap, and it is still the most widely used form of thermometer in many parts of the world. 3. Mercury thermometers tend to be much more durable under duress. They provide very good repeatability and their calibration remains unaffected. A questionnaire was then given to the nurses at the end of data collection to gauge their views of the new LCTs. 2. All data collected were analysed by using the SPSS 10.0 and STATCALC statistical packages and the Bland and Altman plots for assessing agreement between two methods of clinical measurement [20]. Published by Oxford University Press. Unfortunately only six nurses completed the simple evaluation questionnaire. Advantages & Disadvantages of Mercury Thermometers Mercury thermometers are inexpensive, durable and accurate. 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. Following are the major advantages associated with the use of liquid-in-glass thermometers: They are comparatively cheaper than other temperature … Low sensitivity occurs in RTD. Advantages of Infrared thermometers. It consumed a lot of electricity which produce a lot of heat. It has on a sticker that has an adhesive back to stick to the patient's axilla. Your comment will be reviewed and published at the journal's discretion. The weights of the children studied were between 2.22 and 36 kg with a median of 8.8 kg and an inter-quartile range of 6.5–11.9 kg. Required fields are marked *. Please check for further notifications by email. Some authors recommended caution in their use by parents in the home [15]. In order to assess reliability over time, one of the NextempR thermometers used for the study was tested against GMT on 10 children, 8 months after the start of the study. However, they present many safety and environmental hazards. What is Pyrometer? Boxplot of temperature difference between GMT and Traxit. 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. Box plots of the temperature differences between GMT and NextempR and GMT and TraxitR are shown in Figs 1 and 2. A novel thioctic acid-carbon dots fluorescence sensor for the detection of Hg. The TraxitR thermometer was stuck in place in the patient's axilla following exposure of its adhesive backing. It involved a convenience sample of 200 children who were admitted with fever. In order for a new technology to be introduced into everyday practice it is essential that it is well accepted by those using it most frequently—in this case the nursing staff. One of the principal advantages of liquid crystals is their ability to map out thermal regions of different temperature. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide, This PDF is available to Subscribers Only. The big advantage of the GMT is that it is cheap, and it is still the most widely used form of thermometer in many parts of the world. The first author (L.M.) They are also easy to calibrate and provide very accurate readings. Whilst primarily used for the detection of fever, the LCTs have also been reported to be useful in the detection of hypothermia in infants, particularly at the community level in resource-poor settings [16–18]. Due to low power consumption, small heat emitted during operation. There are some disadvantages of liquid crystal display (LCD) which are given below, In high temperature environments there is loss of contrast. The NextempR and TraxitR thermometers (Medical Indicators, Pennington, NJ, USA) are examples of the newer generation of LCTs and have been on the market for several years. 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. Unlike electrical thermometers, they do not necessitate power supply or batteries for charging. Liquid in glass thermometers are fragile and for industrial use, the thermometer is mounted in a protective housing and the scale is engraved on a separate plate that is part of the protective case. Each dot contains three liquid cholesteric crystal compounds and a soluble additive. The disadvantages are that they break easily and there is risk of mercury poisoning if the glass tube breaks. 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. There are some disadvantages of resistance temperature detector (RTD) which are given below. GMTs are, however, not without their problems. From the viewing angle, the color and contrast not consistent. Agreement between Nextemp and mercury thermometer. It has individual liquid crystals which cannot complete all block of the backlight. 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]. 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