Subclavian Vein Blood Sampling in Conscious Rats
November 3rd, 2023
Here we present a combination of effective rat restriction and subclavian vein puncture methods that enable rapid, safe, and repeated blood collection in rats without anesthesia.
The scope of our research is centered on devising infection methodologies for collecting blood samples from rats. Our aim is to ensure rapid and safe procedures that align with radar principle, utilizing minimal manpower and resources. One of the current experimental challenges is to effectively immobilize the rat in a manner that simultaneously maintains the subclavian vein in close proximately to the skin surface for optimal blood collection.
The advantages of our protocol is that high quality blood samples can be obtained quickly by a person without anesthetizing the rats. On the day of the blood sampling, place the rat in the cage at 8:00 AM.Weigh the food and water and place them in the cage. Define successful blood sampling based on the following criteria.
Have a blinded researcher record the rat's weight, food consumption, and water intake, daily at 8:00 AM.Next, gently stroke the rat's back skin, and pinch its neck repeatedly to help the rat relax. Using the non-dominant hands, thumb, and index finger, grip and lift the rat's neck skin. Using the remaining three fingers and the palm of the non-dominant hand, secure the rat's back skin and with the help of the dominant hand, immobilize its front limbs.
Using the non-dominant hands index finger, gently push down on the rat's head skin. Rotate the shoulder joint outwardly with the other fingers along the palm while the dominant hand fully extends the shoulder joint. Grip the rat firmly with the non-dominant hand to align its head and body in a straight line.
Locate the clavicle with the dominant hand and confirm the injection site. Disinfect the site with alcohol, then flush the syringe with sodium heparin. Hold the syringe parallel to the rat's body and the dominant hand with the needle tip facing upwards, and the syringe scale toward the experimenter.
Insert the needle 0.5 centimeters below the clavicle notch. Gently withdraw the syringe to create negative pressure collecting 0.1 to one milliliters of blood at a constant speed. Apply a cotton swab for hemostasis and return the rat to its cage.
Average blood collection times for groups A and B were similar over 96 hours. Blood collection success rates were 93.8%for group A, and 95.8%for group B with no significant difference. Group A had a shorter average blood collection time on the second day compared to the fourth day.
The number of attempts for successful blood collection averaged 1.21 for group A, and 1.17 for group B.More attempts and longer puncture times indicated higher failure rates. Both groups showed steady weight gain over four days. Water and food intake remained relatively constant among rats of the same sex.
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Overview
This study presents a protocol for effective blood collection from rats using a combination of immobilization techniques and subclavian vein puncture. The method allows for rapid and safe blood sampling without the need for anesthesia.
Key Study Components
Area of Science
- Neuroscience
- Animal Research
- Blood Collection Techniques
Background
- Collecting blood samples from rats is essential for various research applications.
- Traditional methods often require anesthesia, which can complicate the procedure.
- Effective immobilization is crucial for accessing the subclavian vein.
- Minimizing stress and resources during the process is a priority.
Purpose of Study
- To develop a safe and efficient method for blood collection in rats.
- To reduce the need for anesthesia during blood sampling.
- To ensure high-quality blood samples can be obtained quickly.
Methods Used
- Combination of rat immobilization techniques.
- Subclavian vein puncture for blood collection.
- Assessment of blood sampling success criteria.
- Monitoring of rat welfare during the procedure.
Main Results
- High-quality blood samples were successfully obtained.
- The method proved to be rapid and efficient.
- Blood collection was achieved without anesthesia.
- Criteria for successful sampling were clearly defined.
Conclusions
- The developed protocol enhances the efficiency of blood collection in rats.
- It minimizes the stress associated with anesthesia.
- This method can be beneficial for various research applications requiring blood samples.
