Quiz 15: Arterial, Intravenous Iv, and Special Collection Procedures

Medicine

In order to detect the presence of the fungi and bacteria in the blood, the blood cultures are performed. Cultures are also used for the identification of the blood infection, which can lead to severe life-threatening complications such as septicemia. These blood cultures are usually collected from the patients suffering from FUO (fever of unknown origin). The blood culture collection should be done with aseptic technique with meticulous care. Every precaution while collecting the blood culture helps in minimizing the percentage of the contaminated blood cultures. Venipuncture is a major method, which is commonly used for collecting the blood samples for the blood cultures. Another method used for collection of the blood specimen is known as the indwelling catheter, which is not recommended while collecting the sample for blood culture as this method result in high levels of contamination. The possible interfering factors in the collection of blood for blood culture are given below: 1. In the case where the blood culture collection is prescribed along with other laboratory tests, the blood culture samples must be collected first. The use of evacuated blood collection tube before the blood culture bottles cause the contamination of the needle and can lead to the false-positive results. 2. The blood culture collection should be performed before the antibiotics initiation as antibiotics in the blood can inhibit the growth of the bacteria and cause false-positive results. 3. The inoculation of anaerobic blood culture bottle should be done prior to all the procedures except the method called as the butterfly assembly method. This is because injection of air can cause the death of the anaerobic microorganisms into the anaerobic bottle. This can also lead to the false-positive results.

ABGs (arterial blood gases) are a type of blood test, which is used for measuring the amount of carbon dioxide and oxygen in the blood. This test can also be used for determining the blood pH. Imbalances in the pH levels, oxygen and carbon dioxide in the blood found related to the medical conditions such as chemical poisoning, kidney failure, heart failure, drug overdose, and shock. The continuation of the external iliac artery is referred as the femoral artery. It supplies the blood to the lower limbs in the thigh region. The femoral artery is used for inserting the catheter during the angiogram test. The main artery of the lateral forearm is known as the radial artery. For performing the transradial angioplasty, the radial artery is accessed. The ulnar artery is an important blood vessel, which supplies to the medial aspect of the forearm. The radial artery is used during the procedure of radial artery puncture. Hence, the options b, c and d are incorrect. The major blood vessel found in the upper arm is known as the brachial artery. It is also known as the continuation of the axial artery. For the collection of blood, during ABG analysis the brachial artery is considered as the preferred site. Hence, the correct answer is option img .

The blood transfusion is defined as the transfer of the blood into the vein of an animal or human. The blood transfusion requires the blood, which is either obtained from the blood bank or taken directly from the donor. The blood transfusions are classified as the therapeutic measure, which is used for restoring the volume of blood and plasma after extensive burns, trauma, and hemorrhages. The blood transfusion involves various steps, including blood donation, blood processing, testing and compatibility testing. The blood transfusion also includes the transfusion of the blood components like platelets, clotting factors, blood cells, and plasma. A homologous blood transfusion is described as an intravenous infusion of the blood, which has been already donated by some other person. In an autologous blood transfusion, the patient receives his own blood, which he has donated previously. Autologous blood transfusion is always preferred over the homologous transfusion of the blood because of the possible complications related to the homologous transfusion of blood.