a)
Pulse oximetry is based around the principle that oxygenated Haemoglobin will absorb more light of certain specific wavelengths of light than deoxygenated haemoglobin and vice versa. Two wavelengths of light are used in pulse oximetry, red light of approximately 600nm, and infrared light with wavelengths of approximately 900nm. These two wavelengths of light are used to differentiate between two different substances, each with their own absorbance characteristics.
b)
When performing pulse oximetry there are various substance that will absorb both wavelengths of light, including the venous blood. To counter this, the readings are taken with respect to the subject’s heart beat and the resulting influx of arterial blood. The blood flow
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With positive temperature coefficient thermistors, resistance increases as the temperature increases. Thermistors measure the temperature of the sensors not the patients themselves. Thermistors require an adhesive cover to attach to skin, and can range from relatively cheap and disposable models, to reusable but more expensive models.
Infrared radiation temperature measurement systems detect the radiation emitted from the tympanic membrane and the surrounding ear canal. The detected energy is proportional to actual temperature of the subject. These sensors are non-contact and relatively sterile. These sensors are also relatively fast, with a response time of approximately 0.1 second.
3
a)
The light source provides the polychromatic light, producing a variety of wavelengths of light. When a wavelength of light between 360 – 950 nm is required a Tungsten-filament lamp is used. When ultraviolet light is needed, a Deuterium lamp is used.
The filter is used to isolate the required portion of the source spectrum, and reduce and remove some unwanted frequencies.
The Diffraction Grating works separates the wavelengths of the incident light into separate monochromatic beams. On the diffraction grating there are thousands of grooves, that act to reflect polychromatic light at each of the grooves, resulting in interference and the reflected light transmitted in discrete directions.
The diverging wavelengths of light are then reflected by a mirror towards
In elecronic, broadcast, transportation, filters are used to select the desired signal, and deny or block unwanted signals. Or put in other words, they may be the only way we have to block.The doing so, we want to signal and other frequency or with a device, is frequency-selective - it behave different towards different frequencies. Such device is called a filter. (Bertrand, 2002)
The purpose of arterial pressure and the pulse lab is to determine the effect of posture and exercise on systolic and diastolic pressure and the heart rate. And also in order to find the differences in the reading taken under these condition compares to the baseline reading. The Sphygmomanometer and stethoscope are used to measure the systolic and diastolic blood pressure, counting the beat on the radial artery will give the reading for pulse rate and by using the lab scribe software and IWX214, the blood pressure will be measured. In the heart, the aorta and the carotid arteries have baroreceptors and the chemoreceptors that identify the changes in arterial pressure and the changes in
Articles discussing the accurate recordings of pediatric patient’s body temperature were cited in this article. A logical sequence is followed in the literature review. It begins with a general overview of the historical importance of accurately recording a patient’s body temperature. The authors get more specific and cite studies on temperature recording techniques in children. For instance, in justifying conflicting data, the researchers cite a similar study conducted on new born babies by Polit & Beck (2008), where the recordings from the two methods were
Pulse oximeter used to check his oxygen saturation level, which was 98% on air with no central or peripheral cyanosis. Since Mr Devi, does not seem to have any sign of abnormal respiration. The next assessment is circulation, where there are many physical signs to look for. The colour of the hand and digits, are they blue, pink, pale or mottled. Also need to measure for capillary refill time (CRT) by applying cutaneous pressure for 5 Sec on a fingertip held at heart level of Mr. Devi. The normal value of CRT is usually less than 2 second prolonged CRT suggests poor peripheral perfusion. Measure his Blood Pressure (B/P), count pulse rate by listening to the heart with a stethoscope or palpate peripheral and central pulses, assessing for the presence, rate, quality, regularity and equality. All of this assessment indicates the cardiovascular system in the patient is within the normal range or is there any emergency measures should take (Resus.org.uk 2016). However, Mr Devi’s circulation is a concern because his HR was 110bpm which is higher than normal range, the normal heart beat for adults ranges from 60-100bpm. Also his BP was 190/99mmhg with mean arterial pressure (MAP) of
11.A. The stimulus is the hypothalamus sensing that the temperature is too low or too high and sends out signals to cool the body. The response is that the blood vessels in the skin dilate to radiate heat and the sweat glands increase sweat production.
All tests were conducted in the same posture; leaning over the lab table with elbows resting on the table and the head down. Students worked in groups of three to four, and each one took turn being the experimental subject, taking the pulse and handling the stopwatch. To measure the radial pulse manually, the subject’s palm was facing upward. The index and middle fingers were used to locate the pulse between the radial bone, which is on the same side as the thumb, and with a slight pressure, the pulse could be found.
1. The system has a good structure design.2. Warm air makes patients feel warm and stop shivering.3. The system cannot cause burns and water leaks around electrical equipment are not a problem, as they are with water-circulating blankets.4. The disposable blankets eliminate the potential for cross-contamination among patients.5. The system
The pulse is an indication of an individual’s heart rate. When checking for a pulse in the primary survey, begin with palpating the patient’s radial or carotid artery (Basic Patient Care 2012, p. 50). This may reveal a normal (60-100 beats/min), tachycardia (<100 beats/min), bradycardia (> 60 beats/min) or asystole heart rate. Additionally, the capillary refill may also provide details about a patient’s cardiovascular status. This is performed by applying pressure to the nail bed and calculating the time it to takes to refill to a normal color, which should take no more then a few seconds otherwise suggesting capillary closure (Mick J Sanders, 2012, p. 1400). An additional accessory to Circulation is Hemorrhages, these involve more through examinations of the pulse, blood pressure and warmth of peripheries of patients. Additionally, you must thoroughly look for indication of bleeding, specifically in the areas around the chest, abdomen and externally seen by the eye.
A sphygmomanometer was used to measure the blood pressure and heart rate of the subject. First, the basal heart rate and blood pressure for each subject was collected by taking the mean of the data on the left arm from three
This technological advancement facilitates the potential use of a \ac{WHTD} as a solution to relieve the burden on the health care system. The \ac{WHTD} refers to the devices which are capable of monitoring the physiological signs (e.g., heart activity, \ac{ECG}, \ac{EMG}, blood pressure, body temperature, oxygen saturation, etc.) of the human body and its surrounding environment (e.g., light, humidity, temperature, etc.) using a number of sensors located on or/and in the human body using \ac{BAN} \cite{movassaghi2014wireless,bangash2014survey,jovanov2011body}. This has been employed in various applications, such as military and sports training, \ac{HCI}, entertainment (interactive gaming), home and office automation, environmental monitoring, and \ac{VR}. It has also shown a tremendous potential as a personal healthcare system, which can provide services such as remote patient and elderly people monitoring, activity monitoring, rehabilitation, and disability assistance services as these devices can monitor health status seamlessly in real-time without disturbing users daily life. Consequently, major \ac{ICT} companies are introducing various wearable devices and services with Personalised Health Data management systems. Apple iWatch with HealthKit, Samsung Galaxy fit and Samsung Digital Health, and Google Fit are some of the
The purpose of the experiment is to see how different variables affect pulse rate and blood pressure.
amount of pressure exerted on arterial walls in the patient’s heart. Blood pressure is measured in
The proper yet least invasive route to perform the measurement of a core temperature in children has been an ongoing debate. Common methods or routes include axillary or in the armpit area, oral, rectal, tympanic, and temporal. Proper temperature measurement with an accurate result is important for diagnosis and treatment, especially in febrile children. False positive measurements can lead to extensive and unnecessary diagnostic testing while false negatives can lead to under treatment in a fragile population, which is why the
With today’s science, light becomes more specifically perceived as a spectrum. The specific name for this spectrum is the electromagnetic spectrum, which contains many types of waves (NASA, Electromagnetic Spectrum). In Figure 2, the spectrum shows a variety of wavelengths with specific wavelengths classified by its length. The range of wavelengths humans can see wavelengths that are around 400 – 700 nanometers (nm) as colors while all other electromagnetic waves are simply blind to humans. The interesting classes for light that are used to measure are microwave and infrared light. The laser is