Bedside test

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As a bedside test ( bedside -. English for "bedside") "laboratory studies" are called, which can be performed directly at the bedside and figuratively near the patient, without sending the sample material in a laboratory. The most important bedside test is used to determine blood groups . This medical measure is generally carried out before every blood transfusion in order to avoid any mix-ups of blood products. The blood group of the respective recipient is compared with that of the blood reserve used. The principles of the process go back to Reuben Ottenberg (1907).

procedure

so-called bedside test for a quick blood group check

The blood to be transfused is a medical device and is predetermined by the laboratory; however, fatal mix-ups (wrong blood test, wrong patient) could occur, against which the bedside test is intended to protect. The bedside test is carried out on a small card on which there are three test fields with anti-A, anti-B and anti-D serum. Thus, the blood group in the AB0 system as well as the Rhesus factor can be tested. In order to avoid incorrect determinations, binding colors apply to the individual sera, which are identical to the colors used in laboratories: Anti-A serum is always colored blue, Anti-B serum is yellow. A drop of blood is placed on each field and mixed individually using a plastic stick. After the test has been completed, the test card can be archived for a few days covered with an adhesive film. B. not included in the medical record; medical documentation of the test result is generally sufficient.

Practical example: Blood with blood group A and Rhesus factor positively agglutinated ("clumped") on the Anti-A field, remains unchanged on Anti-B and clumps together on Anti-D.

swell

Individual evidence

  1. ↑ J. Hallbach: Clinical chemistry for entry. Thieme, 2005. p. 448