Product Name	Veterinary ESR Blood Collection Tube
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Product Overview	The Veterinary ESR Blood Collection Tube is a vacuum specimen tube designed for erythrocyte sedimentation rate testing of anticoagulated whole blood. It contains sodium citrate anticoagulant and is commonly supplied with a black closure for rapid laboratory identification. The reference configuration uses 3.8% sodium citrate at a 1:4 citrate-to-blood ratio for Westergren ESR testing. The calibrated vacuum draws the intended blood volume into the tube, helping maintain the required relationship between anticoagulant and specimen. The tube is suitable for veterinary diagnostic laboratories, commercial livestock farms, breeding facilities, animal hospitals and herd health programs where ESR measurement is included in the applicable diagnostic protocol. Veterinary interpretation should always use species-appropriate laboratory procedures and reference values.
Key Features	Designed for erythrocyte sedimentation rate testing of whole blood samples. 3.8% sodium citrate configuration available for Westergren ESR procedures. Reference anticoagulant-to-blood ratio of 1:4. Pre-set vacuum supports controlled specimen collection to the intended fill volume. Black closure provides convenient visual identification of the ESR tube category. PET plastic or borosilicate glass tube configurations are available. Clear tube body allows convenient visual inspection of the specimen. Compatible with suitable vacuum blood collection needles and holders. Available in different capacities and dimensions according to laboratory requirements. Single-use design supports standardized veterinary sampling and biosecurity procedures.
Structural Components	Vacuum Tube Body: PET plastic or borosilicate glass container designed to maintain the specified internal vacuum. Sodium Citrate Additive: Anticoagulant used to prevent coagulation while maintaining the required dilution for ESR testing. Black Safety Cap: Provides rapid identification of the ESR tube and protects the closure area. Rubber Stopper: Maintains the vacuum and allows penetration by a compatible blood collection needle. Identification Label: Provides space for animal identification, sample number, collection date and other laboratory information. Pre-Set Vacuum: Regulates the intended blood draw volume during collection.
Working Principle	During venous blood collection, the tube is inserted into a compatible holder after successful venipuncture. The internal vacuum draws blood through the collection needle until the intended volume is reached. Sodium citrate binds ionized calcium and temporarily inhibits the coagulation process. For ESR testing, the correct citrate-to-blood ratio is important because incorrect filling can alter sedimentation behavior and affect the validity of the result. After collection, the tube should be gently inverted according to the applicable laboratory procedure to ensure uniform mixing of the anticoagulant and blood. The prepared whole blood sample can then be analyzed using a compatible Westergren ESR method or suitable automated ESR analyzer.
Technical Specifications	Product Type Veterinary ESR vacuum blood collection tube Primary Test Erythrocyte Sedimentation Rate Reference Method Westergren ESR method Reference Additive 3.8% sodium citrate Reference Mixing Ratio 1 part sodium citrate to 4 parts blood Specimen Type Anticoagulated whole blood Cap Color Black Tube Material PET plastic or borosilicate glass Reference Capacity 1.6 ml, 2.4 ml, 3.2 ml or other volumes according to configuration Reference Tube Size 13 × 75 mm or other dimensions according to configuration Collection Method Pre-set vacuum blood collection Use Type Single use Sterilization Available according to product configuration
Applications	Veterinary erythrocyte sedimentation rate testing. Livestock inflammatory screening where ESR is included in the diagnostic protocol. Cattle and large-animal diagnostic blood sampling. Commercial pig farm veterinary laboratory programs. Horse and companion animal laboratory testing where applicable. Veterinary hospitals and animal diagnostic laboratories. Breeding farms and livestock health monitoring programs. Animal research and veterinary teaching facilities. Veterinary blood collection consumable supply packages.
Customization Options	Tube capacity: Customizable. Tube dimensions: According to project requirements. PET or glass tube material: Available upon request. Closure and stopper configuration: Customizable. Label and barcode printing: Available upon request. Packaging quantity: According to project requirements. Veterinary blood collection kits with needles and holders: Available upon request.
Use & Handling	Select the required tube size according to the veterinary laboratory procedure and expected blood sample volume. Inspect the tube before use and do not use it if the tube is cracked, the closure is loose or the vacuum integrity is questionable. Perform venipuncture using a compatible veterinary blood collection needle and appropriate animal restraint. Insert the tube into the holder and allow the vacuum to draw blood until filling is complete. Correct filling is particularly important for sodium citrate tubes because the anticoagulant-to-blood ratio affects test accuracy. Underfilled or overfilled specimens may not be suitable for reliable ESR analysis. After collection, gently invert the tube several times according to the applicable tube and laboratory instructions. Do not shake vigorously. Samples should be identified, stored and analyzed according to the veterinary laboratory's validated ESR procedure. Used tubes and blood collection components should be discarded according to local veterinary biohazard and sharps-disposal regulations.
Product FAQ	What is an ESR blood collection tube used for? It is designed to collect anticoagulated whole blood for erythrocyte sedimentation rate testing. What anticoagulant is used in the reference ESR tube? The reference configuration uses 3.8% sodium citrate. What is the citrate-to-blood ratio? A common Westergren ESR configuration uses one part sodium citrate to four parts blood. Why is the correct fill volume important? The intended fill volume maintains the required anticoagulant-to-blood ratio. Incorrect filling can alter specimen characteristics and affect the reliability of the ESR result. Why does an ESR tube commonly have a black cap? Black closures are widely used to identify ESR sodium citrate tubes and help laboratory staff distinguish them from other specimen tube types. Can this tube be used for veterinary samples? Yes, when the veterinary laboratory uses a validated ESR procedure for the relevant animal species. Interpretation should always follow species-specific diagnostic protocols.
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