Plasma osmolality (POP) refers to the number of molecules (mg) per kilogram of water, clinically expressed in mOsm / (kg · H2O) or mmol / L, mainly related to the concentration of sodium ions in plasma. An increase indicates a decrease in moisture in the body or an increase in the mass of the solution. More common in diabetic hyperosmolar coma, diabetes insipidus, heatstroke hyperthermia, hypertonic dehydration, etc.

Basic Information

Specialist classification: cardiovascular examination classification: blood examination

Applicable gender: whether men and women apply fasting: fasting

Analysis results:

Below normal:
A decrease in plasma permeation pressure indicates an increase in the amount of water in the body or a decrease in solute. More common in heart failure, hypoproteinemia, hyponatremia, renal failure, oliguria, hypotonic dehydration.

Normal value:
Plasma osmotic pressure: 280-320mmol/L

Above normal:
An increase in plasma osmotic pressure indicates a decrease in body water or an increase in the mass of the solution. More common in diabetic hyperosmolar coma, diabetes insipidus, heatstroke hyperthermia, hypertonic dehydration.

negative:

Positive:

Tips: Some drugs can affect the results, the doctor should be informed in detail before the test. Normal value

The normal value is 280-320 mmol/L.

Clinical significance

1. Increase indicates a decrease in water in the body or an increase in the quality of the solution. More common in diabetic hyperosmolar coma, diabetes insipidus, heatstroke hyperthermia, hypertonic dehydration.

2. Decrease indicates an increase in the amount of water in the body or a decrease in solute. More common in heart failure, hypoproteinemia, hyponatremia, renal failure, oliguria, hypotonic dehydration.

Low results may be diseases: hypotonic dehydration, high results of neonatal hyponatremia may be diseases: water, electrolyte disorders associated with mental disorders, isotonic dehydration, sputum, stagnation

1. Conventional arterial blood should be taken for examination. If venous blood is to be taken, the forearm should be immersed in 45 °C warm water for 20 minutes to make the venous blood arterial. It is not advisable to use a tourniquet when drawing blood.

2. Flush with heparin beforehand in the syringe;

3. Ensure that the needle and needle of the syringe are tightly combined, and there must be no air leakage to ensure that the blood sample does not come into contact with the outside air;

4. Send samples in time;

5, some drugs can affect the results, the doctor should be informed in detail before the test.

Inspection process

The arterial blood is drawn with a syringe and then examined.

Not suitable for the crowd

Patients who have taken contraceptives, thyroid hormones, steroid hormones, etc., may affect the results of the test, and patients with a history of drug administration in the near future are prohibited.

Adverse reactions and risks

1, dizziness or fainting: in the blood draw, due to emotional overstress, fear, reflex caused by vagus nerve excitement, blood pressure decreased, etc. caused by insufficient blood supply to the brain caused by fainting or dizziness.

2. Risk of infection: If you use an unclean needle, you may be at risk of infection.