Explanation:
During a venipuncture, a holder is needed to secure the needle during insertion into the tube stopper. A holder is a device that holds the needle in place and provides stability while the healthcare professional performs the venipuncture. It ensures that the needle does not move or dislodge during the procedure, reducing the risk of injury or complications. A holder is specifically designed for this purpose and is an essential tool in venipuncture procedures.
Explanation:
When performing a venipuncture, the tourniquet should be wrapped around the arm about 3-4 inches from where you are going to feel for a vein. This positioning allows for adequate blood flow restriction, making it easier to locate and access the vein. By wrapping the tourniquet at this distance, healthcare professionals can ensure a successful venipuncture procedure.
Explanation:
A centrifuge is an instrument commonly used in laboratories to separate the cellular and liquid portions of the blood. It achieves this by spinning the blood sample at high speeds, causing the heavier cellular components to settle at the bottom of the tube while the lighter liquid portion remains on top. This separation allows for further analysis or testing of specific components in the blood, such as red and white blood cells or plasma.
Explanation:
The most commonly used needle gauges for venipuncture are 21-22. These gauges are ideal for drawing blood as they are large enough to allow for a smooth flow of blood, but not so large that they cause excessive pain or damage to the vein. The 21-22 gauge needles strike a balance between being effective and comfortable for the patient.
Explanation:
The patient should not eat, smoke, or drink coffee or alcohol for 10 hours before or during the glucose tolerance test. This is because these activities can affect the results of the test and give inaccurate readings. Fasting for a certain period of time ensures that the body's glucose levels are not influenced by external factors, allowing for an accurate assessment of the patient's glucose tolerance.
Explanation:
The higher the gauge number, the smaller the needle. This is because the gauge number refers to the thickness of the needle. So, a higher gauge number indicates a thinner needle, making it smaller in size.
Explanation:
The blood lancet is used for the collection of blood specimens by skin puncture. Skin puncture involves pricking the skin to obtain a small blood sample for testing purposes. This method is commonly used for glucose monitoring, especially in diabetic patients, as well as for other blood tests such as hemoglobin levels or blood typing. Skin puncture is a less invasive and less painful method compared to venipuncture, which involves drawing blood from a vein. The blood lancet is a small, sharp instrument designed specifically for this purpose, allowing for a controlled and precise puncture of the skin to obtain the necessary blood sample.
Explanation:
The most important step in the performance of a venipuncture is positively identifying the patient. This is crucial to ensure that the procedure is being performed on the correct individual, preventing any potential harm or errors. Positive identification helps to avoid situations such as misdiagnosis, incorrect treatment, or transfusion reactions. It ensures patient safety and promotes accurate and effective healthcare delivery. Selecting the correct needle gauge, selecting the appropriate cleansing agent, and selecting the appropriate tourniquet are also important steps in the procedure, but positively identifying the patient takes precedence as it directly impacts patient care and outcomes.
Explanation:
The evacuated glass tubes in the blood collection system come in different sizes, and the stoppers are color-coded to denote the type of additive or lack of one. This means that each color represents a specific type of additive or lack thereof, making it easier for healthcare professionals to identify and select the appropriate tube for blood collection.
Explanation:
When performing a venipuncture, making a fist can cause the veins to become more prominent. This is because making a fist helps to increase blood flow and pressure in the veins, making them easier to locate and access for the procedure. By making a fist, the muscles in the hand and forearm contract, which pushes blood into the veins and causes them to bulge and become more visible. This can make it easier for the healthcare professional to find a suitable vein and perform the venipuncture successfully.
Explanation:
When cleansing the venipuncture site, it is good practice to cleanse the site from the inside out and allow it to air dry. This method ensures that the site is thoroughly cleaned and reduces the risk of introducing any contaminants into the puncture site. Allowing the site to air dry also prevents any potential irritation or discomfort that may occur if the alcohol is not completely dry before the needle is inserted.
