What is heat stroke ? Heat stroke is the illness that a core body temperature greater than 105 degrees Fahrenheit (40.6 °C ) , It is associated with central nervous system that occur after exposure to high temperatures due to environmental heat exposure. This is distinct from a fever, where there is a physiological increase in the temperature set point of the body. Heat stroke is not the same as a stroke. "Stroke" is the general term used to describe decreased oxygen flow to an area of the brain.
In order for an ice cube to melt, it needs to be kept in a warm place for the ice to change state, after the ice melts, it changes into water. The water can change state into gas by EVAPORATION. If more heat is given to the water, say by warming it in a pan, the water molecules move even faster. Given enough heat, they will move so quickly that they escape from the surface of the water altogether. The water boils, turning into gas known as water vapour.
Mpemba first encountered the phenomenon in 1963. The hot water’s temperature is more likely to cool to temperatures below zero degrees Celsius, because in the cold water, when it starts to freeze ice crystals form and floats to the top, forming a sheet of ice over the top of the water, creating an separate layer between the cooler air and the water, stopping evaporation. In the hot water that has supercooled (making it no longer hot), so when it does freeze, it freezes throughout, creating more or less of a slush before freezing solid. Another reason why hot water freezes faster than cold is because hot water is less likely to contain tiny gas bubbles, gas bubbles form from dissolved gasses as the water cools. When cold water cools, ice crystals use the tiny bubbles as starting points for formation.
The danger of earlobes, nose, fingers, and toes is great at low temperatures. Respiratory damage is possible, but not likely. Make sure to use a scarf to cover the nose and mouth when in extreme cold weather conditions. Hypothermia -When your body starts to lose heat faster than it can produce it. - This leads to progressive muscular fatigue.
An example of homeostasis is when we get really cold in winter. Our body begins to shiver, which then generates heat which will enable us to warm ourselves up. This helps maintain our body’s homeostatic state. Throughout homeostasis there are many internal conditions that are controlled within the body, like blood sugar levels, body temperature and the body’s water content. To maintain control of the water content inside the body the concentration of urine must be balanced, to make sure this is done the temperature of the body must be kept at a reasonable temperature because if the body is too hot then a lot of water will be lost through sweat.
Heat Exhaustion Signs and Symptoms The signs and symptoms of heat exhaustion include but are not limited to confusion, dark-colored urine, excessive thirst, dizziness, fainting, fatigue, headache, muscle cramps, nausea, pale skin, profuse sweating, and rapid heartbeat. Risk Factors Heat index has a major affect on the chance of experiencing heat exhaustion. Your risk increases when the heat index is ninety degrees or more. Your body’s ability to cool itself decreases significantly in sixty percent relative humidity or higher. Another risk factor is the “heat island effect”.
Rafael Guadamuz 41. How do ectothermic (cold-blooded) animals make use of water’s temperature-stabilizing effects? Explain the property of water that is responsible for this phenomenon. Warm blooded animals make their own heat, so as long as they are well fed, they can regulate their temperature well. Cold blooded animals don't do this (which is why they eat less and live longer), so their temperature could fluctuate with environmental changes.
Perioperative Hypothermia The aim of this assignment is to explore and discuss the implications of inadvertent perioperative hypothermia during minor procedures that would take less than 30 minutes operating time, particularly knee, ankle arthroscopies and hysteroscopies. In my place of work, for these procedures is considered ineffective the utilisation of any kind of warming methods. These particularly cases of arthroscopies and hysteroscopies meet special conditions like the utilisation of cold fluids for irrigation or the release of the arterial tourniquet (Raju: 2010), that increase the risk to develop hypothermia. In addition, we do generalise the anaesthetic care, not considering the age, health condition and risk of every patient, treating each case only as an arthroscopy or hysteroscopy, ignoring the NICE guidelines (2008) which indicate to use a warming device or warm fluids for patients at higher risk, in procedures shorter than 30 minutes anaesthesia. According to our practice, on admission to Recovery, patients’ temperature is in most of the cases below 36 degree Celsius.
The first documentation on hypothermia was demonstrated by Hippocrates (Adler, 2011). His work was to show that hypothermia lessened injury. Most of the early experiments with hypothermia were using deep hypothermia. This is an induction of hypothermia to a temperature from 20 degrees to 25 degrees Celsius. A drop in temperature this great had negative side effects which made it not practical for use.
Atelectasis affects the exchange of oxygen and carbon dioxide in your lungs, which can lead it to become a very severe problem if one develops it (Mayo Clinic Staff). Lack of deep breaths will result in decreased secretion of surfactant into alveoli in some areas. Decreased level of surfactant leads to collapse of the alveoli (atelectasis). When alveoli collapse, there is less surface area for diffusion of oxygen into the bloodstream. When enough alveoli are atelectatic, oxygen delivery will be reduced.