ISSN 2398-2977      

Blood: packed cell volume (PCV)

pequis

Synonym(s): PCV, microhematocrit


Overview

  • The packed cell volume (PCV) or hematocrit measures percentage of the blood occupied by red blood cells.
  • Measured in %.
  • Separation of blood into 3 layers (red blood cells (RBC)   Blood: erythrocyte count (RBC)  , buffy coat (BC) and plasma) by centrifugation.
  • Determined by red blood cell numbers and state of hydration.
  • Valuable screening test.

Sampling

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Tests

Methodologies

  • Mix blood well.
  • Fill capillary tube leaving at least 15 mm unfilled.
  • Seal end of tube and wipe clean.
  • Centrifuge for 5 minutes at 10,000 rpm.
  • Read immediately using scaled card or other instrument.

Availability

  • Widely available; only requires a centrifuge.

Technique (intrinsic) limitations

  • Individual variation of normal PCV.
  • Variation between breeds and types.
  • Cannot distinguish between increased red cell numbers and decreased plasma volume (dehydration). Therefore, total plasma protein (TPP) must always be read simultaneously.

Result Data

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Barrelet A (2004) Laboratory tests in equine practice Part 2: Haematological analyses. UK Vet (8), 13-23.

RELATED CONTENT

Abdomen: adhesions

Abdomen: lipoma - pedunculated

Abdomen: pain - adult

Abdomen: peritoneal lavage

Anemia: auto-immune hemolytic (AIHA)

Anemia: blood loss

Anemia: chronic disease

Anemia: overview

Anesthesia: pre-anesthetic preparation

Babesiosis

Blood: biochemistry - albumin

Blood: biochemistry - copper

Blood: biochemistry - iron

Blood: biochemistry - total bilirubin

Blood: biochemistry - total protein

Blood: collection

Blood: erythrocyte count (RBC)

Blood: hemoglobin (Hb) concentration

Blood: hemostasis

Blood: mean corpuscular hemoglobin concentration (MCHC)

Blood: mean corpuscular volume (MCV)

Blood: overview

Blood: transfusion

Cardiovascular: balloon-tipped intravascular occlusion

Cardiovascular: vein - thrombosis

Carotid artery: ligation

Cecum: intussusception - cecocecal / cecocolic

Cecum: perforation

Cecum: torsion

CNS: Equine protozoal myeloencephalitis (EPM)

Colitis X

Colon: displacement - pelvic flexure

Colon: displacement - right dorsal

Colon: impaction

Colon: infarction - non-strangulating

Colon: small - obstruction

Colon: torsion

Coughing

Critical care: monitoring

Cyclosporine

Diarrhea: antimicrobial associated

Dispensing (USA)

Endocrine: erythropoietin

Endotoxemia: overview

Fluid therapy: burns

Fluid therapy: overview

Foal: neonatal maladjustment syndrome

Gastrointestinal: enterolith

Gastrointestinal: epiploic foramen hernia

Gastrointestinal: fecalith / bezoar

Gastrointestinal: ileus

Gastrointestinal: physical examination

Gastrointestinal: small intestine - intussusception

Gastrointestinal: small intestine - torsion

Gastrointestinal: stricture

Grass sickness

Heart: atrial fibrillation

Heart: sinus tachycardia

Hypernatremia

Hypocalcemia

Hypoglycemia

Hyponatremia

Hypoproteinemia

Hypovolemic shock

Ileum: impaction

Immunology: immunodeficiency - Fell pony syndrome

Immunology: neonatal isoerythrolysis

Intestine: enteritis - anterior

Kidney: renal failure

Laboratory equipment: centrifuge

Leptospirosis

Metritis-laminitis-septicemia complex

Mycotoxicosis

Nutrition: neonate

Nutrition: nutritional myopathy

Paranasal sinus: bone flap technique

Paranasal sinus: bone flap technique - standing surgery

Paranasal sinus: drainage ostia - enlargement

Peritoneal fluid: cytology

Photoactivated vasculitis

Polydipsia / polyuria

Potomac Horse Fever

Purpura hemorrhagica

Respiratory: anesthesia

Respiratory: exploratory surgery

Ringer's solution

Septic shock

Strongyloides westeri infection

Thrombocytopenia: overview

Toxicity: pesticides

Toxicity: snakebite

Transport

Umbilicus: hernia (strangulating)

Urine: anuria/oliguria

Urine: bilirubin

Urine: dipstick analysis

Urine: hematuria

Uterus: pyometra

Uterus: uterine artery/vein rupture

MEMBER BENEFIT

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!