What are the consequences of not labeling specimens correctly?
Unquestionably, the most serious consequence of specimen labeling errors on the direct care of patients is of one of the following types: Failure to provide proper and immediate care to a patient based on the lack of accurate test results associated with the proper patient.
What is the minimum number of identifiers required to adequately label a blood sample?
two
What are the informations needed in all urine sample labels?
To maintain patient safety standards, specimens must be properly labeled with the name of the patient, a numerical identifier that is unique to the patient (like DOB or SSN), collection date, and the source of the specimen, where applicable.
What are 3 ways to collect a urine specimen?
Diagnosis requires collection of urine generally by 1 of 4 methods: sterile urine bag, urethral catheterization (CATH), suprapubic aspiration (SPA), or clean-catch (CC). Both CATH and SPA are thought to yield the most reliable results by minimizing false-positive results, but these methods are invasive and painful.
What could cause a specimen to be rejected?
The most common reasons for specimen rejection were contamination (n=764, 35.1%), inappropriate collection container/tube (n=330, 15.2%), quantity not sufficient (QNS) (n=329, 15.1%), labeling errors (n=321, 14.7%), hemolyzed specimen (n=205, 9.4%), and clotted specimen (n=203, 9.3%).
What is sample rejection?
Sometimes tests cannot be performed in the laboratory if samples fall short of the quality, volume or other eligibility criteria. In these cases, the laboratory may need to reject the samples, and not carry out processing.
What are the most common preanalytical reasons for specimen rejection?
The most frequent rejection reasons were fibrin clots (28%) and inadequate volume (9%) for biochemical tests. Clotted samples (35%) and inadequate volume (13%) were the major causes for coagulation tests, blood gas analyses and CBC.
What are criteria for blood sample rejection?
Examples of sample rejection criteria
- Unlabelled or mislabelled samples.
- Duplicate samples. Most duplicate samples received on the same day are unacceptable and should not be processed.
- Leaky containers.
- Contaminated samples.
- Inappropriate sample sources.
- Delayed transport time and sample processing.
What are the criteria for rejecting cytology sample?
SPECIMENS WILL BE REJECTED IF: 1. The container and/or slides are not properly labeled with the patient’s name and ID number. 2. The requisition contains incomplete patient information.
Why is a CBC specimen rejected?
Reasons for rejection included hemolysis, clotting, insufficient quantity for test, time delay, incorrect temperature, loss of specimens during transport, and incorrect labeling (Table 1).
Which of the following is a specimen rejection criteria?
In general, specimens will be rejected for the following reasons: Specimens which are improperly labeled. Specimens in which the quantity is not sufficient for proper processing.
Why are Hemolyzed specimens unacceptable for testing?
Grossly or moderately hemolyzed specimens may be rejected. Turbid, cloudy or milky serum (lipemia serum) may be due to the presence of lipids in the blood. Bacterial contamination may alter certain test results and will be rejected.
What does Hemolyzed specimen mean?
Abstract. The term hemolysis designates the pathological process of breakdown of red blood cells in blood, which is typically accompanied by varying degrees of red tinge in serum or plasma once the whole blood specimen has been centrifuged.
Why are Hemolyzed samples rejected?
In some reports, hemolyzed specimens, the most common reason for rejection, account for ∼60% of rejected specimens, fivefold more than the second most common cause (2)….To the Editor.
| . | n | % |
|---|---|---|
| Blood forced into the tube | 26 | 5.1 |
| In vivo hemolysis | 9 | 1.8 |
| Extracorporeal circulation | 7 | 1.4 |
| Specimen frozen | 4 | 0.8 |
What causes a Hemolyzed sample?
Hemolysis resulting from phlebotomy may be caused by incorrect needle size, improper tube mixing, incorrect filling of tubes, excessive suction, prolonged tourniquet, and difficult collection.
How do you know if blood is Hemolyzed?
Hemolysis of blood samples. Red blood cells without (left and middle) and with (right) hemolysis. If as little as 0.5% of the red blood cells are hemolyzed, the released hemoglobin will cause the serum or plasma to appear pale red or cherry red in color.
How does Hemolyzed specimen affects the test result?
Certain lab tests can be affected and the reported results will be inaccurate. It falsely decreases values such as RBC’s, HCT, and aPTT. It can also falsely elevate potassium, ammonia, magnesium, phosphorus, AST, ALT, LDH and PT.
Which test is most affected by hemolysis?
Conclusion. We conclude that hemolysis affects plasma concentration of a whole range of biochemical parameters, whereas the most prominent effect of hemolysis is observed for AST, LD, potassium and total bilirubin.
What happens if a blood sample is Hemolyzed?
Hemolysis describes the rupture of red blood cells (erythrocytes) and release of their contents such as haemoglobin or potassium into the surrounding plasma. In a clinical environment this type of blood sample contamination frequently happens because of improper specimen collection or poor sample handling techniques.
What substances are increases in a Hemolyzed specimen?
Hemolysis may falsely increase the following analytes: AST, alanine transaminase (ALT), LDH, total bilirubin, glucose, calcium, phosphorus, total protein, albumin, magnesium, amylase, lipase, creatine kinase (CK), iron, hemoglobin, and mean corpuscular hemoglobin concentration (MCHC).
What is hemolysis and why does it occur?
Hemolysis is the destruction of red blood cells. Hemolysis can occur due to different causes and leads to the release of hemoglobin into the bloodstream. Normal red blood cells (erythrocytes) have a lifespan of about 120 days. After they die they break down and are removed from the circulation by the spleen.
Can whole blood be Hemolyzed?
In agreement with previous data,2 the process of mechanical injury caused a substantial degree of hemolysis in pooled whole blood, as reflected by an increase of cell-free hemoglobin plasma concentration from 0.5 to 3.5 g/L.
How can you prevent hemolysis?
Best Practices to Prevent Hemolysis
- Use the correct needle size for blood collection (20-22 gauge).
- Avoid using butterfly needles, unless specifically requested by patient.
- Warm up the venipuncture site to increase blood flow.
- Allow disinfectant on venipuncture site to dry completely.
How does hemolysis affect potassium results?
Of all routine blood tests plasma/serum potassium measurement is one of the most sensitive to the effect of hemolysis because red-cell potassium concentration is so much higher than that of plasma (approximately 20 times higher); hemolysis causes a spuriously high plasma potassium concentration.
What causes potassium to Hemolyze?
It is typically caused by hemolysis when the blood is drawn (by either excessive vacuum of the blood draw or by a collection needle that is of too fine a gauge); exces- sive tourniquet time or fist clenching during phlebotomy (which presumably leads to efflux of potassium from the muscle cells into the bloodstream); …