Types of Donation
Blood donations can be categorized several ways. One way is according to the nature of the intended recipients and their relationship to the donor, as follows:
- Allogeneic Donations
- allogeneic donation
- directed donation
- designated donation
- Autologous Donation
Another way to characterize donation types is according to how the donation is collected:
Whole Blood Donation
The most common type of blood donation is a whole blood collection. Approximately 450 mL of whole blood is collected by aseptic venepuncture. Depending on a donor's size, this is about eight to ten per cent of the total blood volume of the average donor. The average amount of blood in one person is five litres. Each year, CBS collects over 900,000 units of whole blood.
From the main CBS Web site:
Donation Types
Whole blood is collected into a multi-bag collection system. The primary collection bag contains 70 mL of an anticoagulant / preservative solution (Citrate, Phosphate, Dextrose, or CPD*). One satellite bag contains 110 mL of a nutrient solution (Saline, Adenine, Glucose, Mannitol, SAGM*). The CPD/SAGM system maintains acceptable red blood cell viability for a 42-day storage period.
*CPD = citric acid 3.27 g/L, sodium citrate 26.3 g/L, sodium acid phosphate 2.51 g/L, dextrose 25.5 g/L.
*SAGM = sodium chloride 8.77 g/L, dextrose 9.00 g/L, adenine 0.169 g/L, mannitol 5.25 g/L.
Whole blood is comprised of red blood cells, white blood cells, platelets, and plasma. Whole blood donations are processed to separate the red blood cells, plasma, and platelets creating three distinct blood products for transfusion to patients. The white cells, which are not needed, are removed by leukoreduction filters.
Updated: October 2011
Allogeneic Blood Donation
Allogeneic blood donation refers to blood donated from an individual which, once tested and found suitable for transfusion is placed in the general blood supply for the purpose of transfusion to another individual unknown to the donor. This is a voluntary donation usually for the national supply. Historically this type of donated blood was referred to as homologous blood.
Further Reading
- Kleinman S, Chan P, Robillard. Risks associated with transfusion of cellular blood components in Canada. Transfusion Medicine Reviews 2003; 17: 120-162. [Medline]
- Thomson RA, Bethel J, Lo AY, Ownby HE, Nass CC, Williams AE. Retention of "safe" blood donors. The Retrovirus Epidemiology Donor Study. Transfusion 1998 Apr;38(4):359-67. [ Medline ]
Apheresis Blood Donation

Apheresis is an automated process in which donor blood is collected, the red cells and plasma or platelets are separated, and then the red cells are returned to the donor.
Using apheresis technology, each year CBS collects approximately:
- 55,000 units of plasma
- 40,000 units of platelets
Donating by apheresis provides large quantities of plasma and/or platelets and, because donors are not giving red cells, they can donate more frequently. Besides apheresis, this process may also be called plateletpheresis when platelets are collected or plasmapheresis when plasma is collected.
Instruments to harvest the plasma or cellular products include the COBE Spectra Cell Separator, COBE Trima Automated Blood Component Collection Cell Separator®, Haemonetics PCS® and MCS®+, and others.
Further reading on apheresis donation
Apheresis Components
- Apheresis Fresh Frozen Plasma
- Apheresis Platelets
Apheresis Fresh Frozen Plasma
Some donors donate plasma by plasmapheresis. The donor's blood is processed through an apheresis machine that extracts only the plasma and returns the rest of the blood to the donor. Plasma may be transfused into a patient or further processed into other products.
Apheresis Platelets
Platelets can be donated by plateletpheresis in which only the platelets are collected and the rest of the blood is returned to the donor. Leukocyte reduction is achieved by an automated process using a chamber in which centrifugal force separates leukocytes from platelets.
For additional information on Apheresis Fresh Frozen Plasma and Apheresis Platelets, see the Circular of Information for the Use of Human Blood and Blood Components.
Updated: October 2011
Autologous Blood Donation
Autologous blood donations are a means for patients to donate their blood many weeks pre-operatively for transfusion to themselves during or post surgery.
Autologous donations are indicated when the likelihood of transfusion during or after a surgical procedure is high and the patient is healthy enough to donate. As many as four autologous donations can be made in four weeks, up to three days before the scheduled surgery.
Autologous programs may be hospital-based or collected at a CBS site.
Further reading on autologous and high risk autologous programs.
Prior to donation, the patients must be evaluated by their physicians or surgeons to ensure it is safe for them to donate. Certain medical conditions disqualify individuals from autologous donation. To donate blood at CBS, the donor must meet some allogeneic donor eligibility requirements. The blood drawn is subject to the standard CBS screening tests before being designated suitable for transfusion.
If the autologous donation is not used by the patient-donor, the blood is discarded and therefore not used for other patients.
The types of autologous donation-transfusion programs described above occur via predeposit of blood. Other types of autologous donation-transfusion exist such as:
- perioperative normovolemic hemodilution (withdrawal of blood immediately before surgery, with volume replacement by crystalloid solutions and subsequent re-infusion of removed blood)
- intraoperative blood salvage
- postoperative blood salvage
These take place in hospitals and are collectively known as perioperative autologous transfusions.
Hospital-based autologous blood donation programs
Autologous blood collection is often required in hospitals because:
- the geographic location of the patient-donor in relation to a CBS collection site is not convenient.
- patients often travel to urban areas for their surgical procedures and want to donate autologous blood closer to home.
- some high risk patients are not accepted by CBS programs and are therefore accommodated at the hospital where the surgery is anticipated. For example, some hospitals have autologous programs for open heart surgery patients.
For these reasons, hospital-based autologous blood programs have evolved. When hospital personnel perform these procedures, the hospital is considered a manufacturer of blood. With this responsibility come strict standards. The following information is provided for guidance and includes but is not limited to requirements specific to autologous blood collection programs outlined in the Canadian Standards Association, Standard CAN/CSA-Z902-04, Blood and Blood Components.
Note: With the permission of Canadian Standards Association, material is reproduced from CSA Standard CAN/CSA-Z902-04, Blood and Blood Components which is copyrighted by Canadian Standards Association, 178 Rexdale Blvd., Toronto, Ontario, M9W 1R3. While use of this material has been authorized, CSA shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof. For more information on CSA or to purchase standards, please visit their website at www.shopcsa.ca or call 1-800-463-6727.
These references only provide basic guidance; users should refer to the standard for the full requirements of autologous donation.
General Requirements
- There must be a medical director responsible for the collection program who authorizes each collection series.
- A hospital that collects autologous blood for transfusion must have operating procedures in place that govern all activities for this program.
- Any deviations from existing procedures must be justified by the medical director in consultation with the patient's physician.
- The patient's physician must prescribe the autologous blood collection.
- Informed consent must be obtained by authorized individuals.
- Autologous blood must be used solely for that purpose and not be crossed over into the allogeneic blood supply.
Donation Criteria
- There are no age limits for autologous collection, unless specified by the medical director responsible for the autologous program.
- A donor questionnaire must be developed by each facility. Many facilities base their questionnaire on the Record of Donation used by CBS
- Guidelines must be established by the medical director and documented in operating procedures. These must include but are not limited to the following requirements:
- Collection should not take place within 72 hours of the planned surgery or transfusion unless collected in peri-operative situations.
- Collection should not be done when the patient has been diagnosed or is receiving treatment for bacteremia or has a conspicuous bacterial infection that may be associated with bacteremia.
- The skin at the phlebotomy site must appear normal.
- The volume of blood collected in relation to the weight of the patient must be considered.
Frequency of phlebotomy must be established in consultation with the patient's physician.
Collection and Labelling
- Operating procedures must include the following critical elements:
essential equipment and supplies.
signs, symptoms and management of donor adverse events and steps to minimize their incidence.
provision of medical care in situations where adverse events occur.
Collections under 300 mL that have not been collected in a reduced amount of anticoagulant must not be transfused.
Inspection of the blood bag prior to use for defects, damage and contamination. Defects must be reported to the manufacturer.
Time of collection, all records, blood bags and samples are properly identified and linked to the donor.
- Blood bags and other equipment or devices used for the collection must be approved by Health Canada and must not be used if defective, damaged or contaminated.
- Blood must be continually mixed during collection and carefully weighed to avoid overcollection. If the blood collected is greater than the maximum capacity specified by the bag manufacturer, the bag must be discarded.
- At the time of collection, additional specimens in tubes must be collected for testing. These must be properly identified at the time of collection.
- The bag and samples must be labelled at the point of donation, before leaving the patient bedside. The unit must be segregated.
- A green label or tag must be attached to each unit and include the following information:
- For autologous use only"
- Patient (donor) full name
- Name of the hospital where the transfusion is intended to take place
- A unique identifying number such as the date of birth, health number or comparable unique identifier
- A biohazard label until samples collected at the time of collection are tested and found to be negative for transmissible diseases. If testing will not take place on this collected unit, as defined in the operating procedures, the unit must be labelled as "untested"
Testing
- The ABO and Rh of the autologous donation must be done at the collecting facility.
- Transmissible disease testing must be performed on the donor, on the first unit collected and within each 42-day period. If the autologous donation is found to be positive for any required transfusion-transmitted disease marker testing and this unit must be shipped to another hospital for transfusion, the shipping facility must notify the receiving facility of the reactive tests regardless of the results of confirmatory testing.
- The patient's physician must be notified of any abnormal results found during testing.
Administration
There must be procedures in place that ensure the issue and transfusion of autologous units before the release of allogeneic units for the patient.
Designated Blood Donation
Designated blood donations are allogeneic donations selected for medical reasons for transfusion to a specific recipient. The donor and recipient are unknown to each other. An example would be a donor with a rare blood type (e.g., lacks a high frequency antigen) whose donation is designated for a patient with an antibody to the high frequency antigen.
Dedicated Blood Donation
Dedicated blood donations involve an allogeneic donor who has been "matched" with a patient who has more specific requirements. A dedicated donor may donate numerous units for the specific recipient. Typically in Canada this will be a platelet donor who has been HLA-matched to a patient who receives regular transfusions. The donor may or may not know the intended recipient depending on the situation.
Updated: November 2011
Directed Blood Donation
A directed donation is a blood donation from a parent or guardian to a minor child who requires transfusion. While there is no evidence that these donations are safer than those from regular anonymous allogeneic donors, CBS offers this service in order to decrease the psychological stress for parents/guardians whose children require a transfusion.
This type of donation must be authorized by the medical director of the hospital transfusion service in consultation with the patient's physician and the local Canadian Blood Services medical director. Pre-screening is required to ensure blood group compatibility.
Blood transfusion from related donors has been shown to increase the risk of transfusion-associated graft-versus-host disease (TA-GVHD).
This complication is common when the donor is homozygous for an HLA haplotype found in the recipient. To reduce the risk of TA-GVHD, all donations from blood relatives must be irradiated before transfusion.