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Bleeding time duke method?
a nick is made in an ear lobe or a fingertip is pricked to cause bleeding. As in the Ivy method, the test is timed from the start of bleeding until bleeding is completely stopped. The disadvantage to the Duke method is that the pressure on the blood veins in the stab area is not constant and the results achieved are less reliable. The advantage to the Duke method is that no scar remains after the test.
What are the Applications of neutralization?
you can use neutralisation for all diffrent types of things but scienctists atend to use it the most for experriments!you can also use it in:agriculture, as soils often contain acidic solutions and plants usually grow best when the soil is slightly alkaline.In medicine, as your blood has a pH of 7.3 and medicine injections must be exactly the same pH. If someone blood is changed by one pH they would die.In digestion, as the stomach is acidic, pH 1 or 2. If we wanted to neutralise the acidity we could swallow an alkaline substance such as sodium bicarbonate.could swallow an alkaline substance such as sodium bicarbonate.To neutralise bee stings, as bee stings are acidic and can be neutralised using an alkali such as bicarbonate of soda, which would calm the irritation.To neutralise wasp stings, as wasp stings are alkaline and can be neutralised using an acid such as vinegar, which would calm the irritation.To neutralise waste from factories, as if this acidic solution is not treated and ends up in the river it could kill fish. Slaked lime is often used to neutralise the solution as it is an alkali.
Capillary sample?
DefinitionA capillary sample is a blood sample collected by pricking the skin. Capillaries are tiny blood vessels near the surface of the skin.Alternative NamesBlood sample - capillary; Fingerstick; HeelstickHow the test is performedSome blood tests are performed on blood obtained by pricking the skin of the finger, heel, or other areas and collecting a drop (or a few drops) of blood on a test strip or into a small container.The area is cleansed with antiseptic and pricked with a sharp needle or a lancet. The blood may be collected in a pipette (small glass tube), on a slide, onto a test strip, or into a small container. Cotton or a bandage may be applied to the puncture site if there is any continued bleeding.How the test will feelSome people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.Why the test is performedBlood transports oxygen, food, waste products, and other materials within the body. It also helps regulate body temperature. Blood is made up of a fluid called plasma and cells. Plasma contains various dissolved substances. The cellular portion consists primarily of red blood cells, but also includes white blood cells and platelets.Because blood has multiple functions, tests on the blood or its components can provide valuable clues in the diagnosis of a multitude of medical conditions.Capillary blood sampling offers several advantages:It is relatively easy to obtain (it can be difficult to obtain blood from the veins, especially in infants).There are several collection sites on the body (heel, fingertips, etc.) and these can be rotated.Testing can be performed at home and with minimal training. For example, diabetics must check their blood sugar several times a day using capillary blood sampling.There are some disadvantages to capillary blood sampling.Only a limited amount of blood can be obtained using this method.There are some risks associated with the procedure (see below).Capillary blood sampling may provide inaccurate results, such as falsely elevated sugar, electrolyte, and blood count values.Normal ValuesSee the specific test.What abnormal results meanResults vary depending on the test performed.What the risks areExcessive bleedingFainting or feeling light-headedInfection (a slight risk any time the skin is broken)Scarring (occurs when there have been multiple punctures in the same area)Calcified nodules (sometimes occurs in infants, but usually disappear by 30 months of age)Damage to blood cells from this method of collection can sometimes cause inaccurate test results (and the need to repeat the test with blood drawn from a vein)Special considerationsCapillary blood sampling is very useful when very small amounts of blood are needed or when blood is very difficult to obtain, such as in infants. Many times, however, when a larger sample is needed, the blood must be obtained from a vein.ReferencesBabar T, Skugor M. Endocrinology. In: Carey WD, ed. Cleveland Clinic: Current Clinical Medicine 2010. 2nd ed. Philadelphia, Pa: Saunders Elsevier; 2010:section 4.Lewandrowski K. Point-of-care testing: an overview and a look to the future. Clin Lab Med. 2009 Sep;29(3):421-32.Hayrapetian-Dorsi L. Genetics. In: Custer JW, Rau RE, eds. Johns Hopkins: The Harriet Lane Handbook. 18th ed. Philadelphia, Pa: Elsevier Mosby; 2009:chap 13.Reviewed ByReview Date: 05/01/2011Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
Why does a balloon break when pricked?
When a balloon is pricked, the sudden release of pressure from inside the balloon causes the elastic material to contract rapidly. This contraction puts stress on the material, leading to its breakage.
What is the possible effect of a balloon pricked by a pin?
When a balloon is pricked by a pin, the air inside the balloon will quickly escape, causing the balloon to deflate rapidly. The balloon will shrink in size and eventually become flat.
What happens when a balloon is pricked through sellotape?
When a balloon is pricked through sellotape, the adhesive surface of the tape initially seals the hole, preventing air from escaping. However, the pressure inside the balloon eventually overcomes the adhesive strength of the tape, causing the balloon to deflate.
How is the production of thunder similar to the pop produced by a pricked balloon?
Both thunder and the pop produced by a pricked balloon are caused by the sudden release of built-up air pressure. Thunder is the result of rapid expansion and contraction of air molecules due to lightning, while the pop of a pricked balloon is the sudden escape of pressurized air from a confined space.
What happens when a balloon filled with water is pricked with a pin?
The balloon pops and the water falls out and splashes onto the floor.
What happens if prick balloons?
If a balloon gets pricked, it will pop or deflate as the air inside rushes out. This is because the sudden release of air creates a hole in the balloon, causing it to lose its shape and size.
What happened if the two balloons clip at both ends of the clothes hanger then pricking one balloon?
what happen to the clothes hanger if you clip balloons on each side then pricked one balloon on the other side
Why does a balloon burst when pricked with a needle?
Because of the small area of the needle and the force that is exerted on the balloon. The pressure inside the balloon that was previously more, finally can diffuse into the room. Since the air canot all escape from the needle prick it bursts to equal the pressure.
A rubber balloon with a piece of scotch tape does not burst when it is pricked by a needle at the piece of scotch tape?
no it's really cool i did it at school and it really works!
What might happen if pricked the balloon?
Generally, it will pop. But it also depends on what you prick it with. A sharpened pencil for example will undoubtedly pop it, no problems there. But an UNsharpened pencil may take a bit more work to pop a balloon, as it does not have a sharp edge.
Why don't balloons pop when pricked through tape?
The tape acts as reinforcement and prevents the hole from the pin to become a rip that bursts the balloon. Without the tape stuck onto the balloon the needle prick would allow the rubber tension to rip itself apart because of the air pressure stretching the rubber which would be in tension. The tape stops the balloon being able to split and so it doesn't burst. It used to be a kids trick to put 2 pieces of tape on opposite sides of a balloon and then push a long knitting needle right through the balloon without bursting it.
Why does a balloon don't burst when pricked with many thumbtacks?
Normally, When you prick a balloon with a needle the hole the pin makes creates a weak point that continues to tear as the pressure inside the balloon attempts to escape. ( I.E. To equalise the pressure inside and outside the balloon ) That is the balloon bursting... The piece of Scotch Tape, however, holds the area around the pinhole together stopping this tearing and preventing the balloon bursting.
