How to draw venous blood
Recently, the topic of medical health has continued to attract attention, especially the standardized process of basic medical operations such as "venous blood collection" has become the focus of heated discussion. The following is a detailed analysis of the steps, precautions and common problems of venous blood collection based on the hot content on the Internet in the past 10 days.
1. Standardized steps for venous blood collection
| steps | Operation content | Things to note |
|---|---|---|
| 1. Preparation | Verify patient information and check whether blood collection tubes, needles, and disinfection supplies are complete | The patient’s fasting status needs to be confirmed (if fasting blood collection is required) |
| 2. Select a vein | The antecubital vein is usually chosen, and dorsal manual vein can be used for obese patients. | Avoid areas of ecchymosis, edema, or infection |
| 3. Disinfection | Centered on the puncture point, spiral disinfection diameter ≥5cm | Use 75% alcohol and wait until it dries before puncturing |
| 4. Puncture and blood collection | Insert the needle at an angle of 15-30 degrees to the skin. Fix the needle when blood returns. | Avoid hematoma caused by repeated puncture |
| 5. Pull out the needle and press | After blood collection, quickly pull out the needle and press it with a cotton swab for 3-5 minutes. | Instruct the patient not to bend his elbow to avoid subcutaneous bleeding |
2. Top 5 hotly discussed issues recently (data in the past 10 days)
| Ranking | question | Discussion popularity |
|---|---|---|
| 1 | Is it normal to bruise after blood collection? | Search volume +320% |
| 2 | The difference between blood collection tubes of different colors | The short video has been played more than 5 million times |
| 3 | How to deal with haemorrhage | Weibo topic reading volume: 18 million |
| 4 | Feasibility of self-collecting venous blood at home | E-commerce platform related product search +75% |
| 5 | Special precautions for venous blood collection in children | Parenting forum discussion threads +210 |
3. Color coding analysis of blood collection tubes (latest guide)
| Cap color | additives | Test item example |
|---|---|---|
| purple | EDTA-K2 | Blood routine, blood type |
| red | No additives | Biochemistry and immunoassay |
| green | Heparin sodium | Hemorrheology, emergency biochemistry |
| blue | sodium citrate | coagulation function |
| black | Sodium citrate (specific ratio) | Erythrocyte sedimentation rate test |
4. Practical tips to reduce discomfort during blood collection
1.Mental preparation: The recently popular "Blood Collection Process Revealed" content on short video platforms can help relieve tension and has been played up to 2.8 million times.
2.physical method: Alternating fist-clenching and relaxing exercises can make veins more visible (a live demonstration by a head nurse in a tertiary hospital received 150,000 likes).
3.pain management: The latest research shows that the cough reflex can disperse the stinging sensation (the number of citations of related papers increased by 40% every week).
5. Emerging technology trends
1. Intelligent blood collection robots have entered the clinical trial stage (tech media reports increased by 65% weekly).
2. Wearable vein locators have become an investment hot spot (the amount raised on the crowdfunding platform exceeded 5 million).
3. A breakthrough in painless microneedle blood collection technology (relevant patent searches increased by 120% monthly).
Warm reminder: The actual blood collection operation must be completed by professional medical staff. This article is for popular science reference only. In case of special circumstances, please seek medical consultation in time.
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