Admin Table of Contents
- 1 What is blind probing?
- 2 What is the most common adverse reaction from a patient when drawing blood?
- 3 How many times can a phlebotomist stick a patient?
- 4 Why is blind probing not recommended as a phlebotomy technique quizlet?
- 5 When should a tourniquet be removed?
- 6 How long should a tourniquet stay on while drawing blood?
What is blind probing?
Not knowing where the vein lies and relocating the needle anyway is considered blind probing, which is not permitted. It can be painful and may produce arterial perforations, resulting in a hematoma and nerve compression or direct nerve injury.
What is the most common adverse reaction from a patient when drawing blood?
The most frequent adverse events include haematoma,a vasovagal reaction or faint, and a delayed faint.
How does a tourniquet affect blood test results?
A prolonged tourniquet time may lead to blood pooling at the venipuncture site, a condition called hemoconcentration. Hemoconcentration can cause falsely elevated results for glucose, potassium, and protein-based analytes such as cholesterol.
What causes hematomas during phlebotomy?
When the needle selected is too large for the vein or the vacuum applied to the vein is too great, a hematoma can result.
How many times can a phlebotomist stick a patient?
The number of venipuncture attempts to insert a short peripheral catheter is a critical factor in the ultimate health of your patient’s veins. The 2016 Infusion Therapy Standards of Practice call for no more than 2 attempts per clinician with a limit on the total number of attempts to 4.
Why is blind probing not recommended as a phlebotomy technique quizlet?
The basilic vein is a perfectly acceptable vein to puncture and in many cases is the prominent vein in the antecubital area. However, blind probing for this vein puts the patient at risk. If the patient experiences a shooting pain sensation, do not attempt to salvage the venipuncture.
What are the possible reasons for failure to obtain blood?
Read on to find out five causes of difficult blood draws.
- Small or Hard-to-Find Veins. This is one of the most common causes of a difficult blood draw.
- Inelastic Veins.
- Scars from Intravenous Drug Use.
- Chemotherapy.
- Students in Medical Lab Tech Courses Should Be Mindful of Trypanophobic Patients.
When do you remove the tourniquet when drawing blood?
Once sufficient blood has been collected, release the tourniquet BEFORE withdrawing the needle. Some guidelines suggest removing the tourniquet as soon as blood flow is established, and always before it has been in place for two minutes or more.
When should a tourniquet be removed?
The current recommendation is that once a tourniquet is applied and tightened, it should not be loosened or removed until the source of the hemorrhage can be controlled by some other means.
How long should a tourniquet stay on while drawing blood?
Remember that the tourniquet shouldn’t be on for more than 1 minute because it can change the blood composition. If you’re drawing multiple tubes, it’s acceptable to keep the tourniquet on when you place a new tube as long as the total tourniquet time remains less than 1 minute.
How do you stop a hematoma from forming?
To prevent a hematoma:
- Puncture only the uppermost wall of the vein.
- Remove the tourniquet before removing the needle.
- Use the major superficial veins.
- Make sure the needle fully penetrates the upper most wall of the vein.
- Apply pressure to the venipuncture site.
What is the primary cause of failure to obtain blood?
Hemolysis is the major cause of specimen rejection because it cannot be detected until the blood cells separate from the plasma or serum.