Blood, the bright red fluid running in your body, can reveal much information regarding your health. Healthcare professionals know how to draw blood from the vein while keeping their patients calm. Their venipuncture techniques are based on the patient’s pain tolerance and prescribed blood tests.
Where is Venous Blood Located in the Body?
Venous blood is deoxygenated blood that circulates through small capillary blood vessels in the tissues. It travels towards comparatively larger veins to reach the heart. Venous blood offers various methods for lab tests.
It can be withdrawn using a syringe, butterfly needle, or vacuum tube. The vein that needs direct puncturing is usually found at the back of the hand or the inner fold of your elbow.
Types of Blood Collection
The three most popular and commonly used blood sampling kinds in these modern times are:
1. Arterial Sampling:
This method is mostly performed in a hospital setting. Your healthcare provider might need it to assess metabolic, mixed acid-base, and respiratory conditions. To rectify these, your CO2 levels need to be studied.
2. Venipuncture Sampling:
This method is widely used to collect blood samples. In Venipuncture, the blood collection happens from the vein in the arm. This vein is called the median cubital and is relatively close to your skin. It Is also the method where you feel the least discomfort as there are no large veins around the median cubital.
3. Fingerstick Sampling:
A finger-prick sampling includes obtaining just a few droplets of blood. As the name suggests, they come from puncturing a tiny hole in the finger. Finger-prick sampling involves taking minimal blood from the patient, usually from the fingertip. This technique is convenient and needs minimal preparation. The finger-stick technique is the most calming among seniors and children.
Venous Blood Sample Purpose
Drawing blood from different body veins gives your healthcare provider clues about your health condition. For example, if you go to your general physician due to fever. And he suspects that you have typhoid. He will request a venous blood sample to ensure.
Most Common Methods for Venous Blood Sampling
There are three most commonly used methods for drawing venous blood.
It can also be called a traditional method of blood collection. A straight needle is fixed at one end of the syringe. It works as a pump made of a cylindrical tube and plunger to pull the blood inside the syringe.
2. Vacuum Tube
This sampling technique also requires a single puncture site. It contains a barrel, needle, and various blood collection tubes. One end of the double-ended needle is attached to the barrel. The blood sample tube is placed beneath the vacuum to draw blood until the needed amount of blood is collected.
3. Butterfly Needle
Winged steel needles are useful not only for drawing blood but also for multiple IV procedures. A liquid must be delivered to the vein via an intravenous catheter. The name butterfly is due to the plastic wings attached to either side of the needle. This medical device contains a hollow needle and provides physicians better access to the vein.
Drawing venous blood combines the healthcare provider’s skills and the right method. Contact our team at Family Diagnostic Clinic for expert IV therapy or venipuncture. Call us at (281) 351-6800 to book an appointment.