LCI Apheresis to Obtain Plasma or White Blood Cells

This study is enrolling participants by invitation only.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00562601
First received: November 21, 2007
Last updated: March 29, 2014
Last verified: March 2014
  Purpose

This study will collect blood plasma and white blood cells from individuals using a procedure called apheresis. Apheresis is a method of collecting larger quantities of certain blood components than can safely be collected through a simple blood draw or blood donation process. The blood components will be used in laboratory research studies to investigate aspects of infectious and immunologic allergic diseases.

Patients 7 years of age and older who are currently enrolled in a NIH clinical research protocol may participate in this study. (Children between the ages of 2 and 6 may participate if they will benefit clinically from undergoing apheresis.) Family members of patients and normal healthy volunteers will also be enrolled.

  • For all adults and children weighing 55 pounds or more. Blood is drawn through a needle placed in an arm vein and circulated through a cell separator machine. The plasma and white cells are extracted, and the red cells are returned to the donor through a needle in the other arm. The procedure takes from 1 to 2 hours.
  • For children weighing less than 55 pounds. One unit (1 pint) of blood is drawn through a needle placed in an arm vein, similar to donating a pint of whole blood. The red blood cells are separated from the rest of the blood and returned to the donor through the same needle. This procedure requires only one needlestick and takes about 30 to 45 minutes to complete. In some circumstances, the procedure must be repeated one or more times in order to obtain large enough quantities of plasma or cells for study.

Condition
Apheresis

Study Type: Observational
Official Title: Apheresis Procedures to Obtain Plasma or Leukocytes for In Vitro Studies

Further study details as provided by National Institutes of Health Clinical Center (CC):

Enrollment: 852
Study Start Date: October 1987
Detailed Description:

In order to carry out in vitro research procedures on the plasma or leukocyte components of blood, it is often necessary to obtain larger quantities of plasma and leukocytes than can be safely obtained by simple phlebotomy. These components can be easily and safely obtained using apheresis procedures performed in the Apheresis Clinic of the Department of Transfusion Medicine, Clinical Center. This protocol is specifically designed to conform to the requirements of the Apheresis Clinic for donors to have apheresis procedures, but the protocol in itself is not a research protocol. Patients must first be admitted to another approved clinical research protocol of the NIAID before they may have the apheresis procedures described in this protocol. Family members and healthy volunteers may undergo apheresis using only this protocol, without the necessity for entry into any other protocol.

  Eligibility

Ages Eligible for Study:   2 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria
  • INCLUSION CRITERIA:

In order to undergo apheresis procedures, patients will be admitted to active clinical research protocols approved by the ICRS. Relatives and normal volunteers may undergo apheresis without first being on an active clinical protocol. Women who are pregnant and normal children will not be studied.

In order to undergo apheresis procedures, as a minimum, patients, family members and control subjects must have a recent history and physical examination, as well as CBC and differential count. Appropriate chemistry and coagulation studies will be performed when clinically indicated. If indicated, a pregnancy test may be performed.

To be eligible for apheresis for research purposes, children must be at least 7 years old, weigh 25 kilograms, have adequate peripheral access to insert needles for apheresis, and be able to undergo apheresis without sedation. If children between the ages of seven and twelve years are to undergo apheresis, a third party not otherwise involved with the protocol (e.g., Bioethicist, Patient Advocate) must talk with the child independently to ensure that the child understands the procedure and freely agrees to participate. This protocol alone is not intended for general study of patients, but only as an adjunct protocol to allow for apheresis procedures.

For patients, the following minimal criteria are required to undergo the procedure:

  • Adequate peripheral venous access;
  • No need for sedation;
  • Weight greater than 25 kg;
  • Hematocrit greater than 27%;
  • Platelet count greater than 75,000/microL;
  • For patients, the hematological values have to be current (up to a week before the procedure).

Healthy volunteers and relatives will have a CBC performed up to 4 weeks before the procedure. In order to be able to undergo the procedure, they must fulfill all of the below:

  • Hemoglobin greater than 11 g/dL for males and greater than 10 g/dL for females;
  • Platelet count greater than 150,000 microL;
  • WBC greater than 3.5 x 10(3) /microL;
  • MCV above 80;
  • Negative HIV, HCV and HBsAg serologies in the past year.

EXCLUSION CRITERIA:

Patients will not undergo apheresis procedures if they have cardiovascular instability, severe anemia, inadequate venous access, severe coagulation disorder, are pregnant, or have any other condition which the attending physician or Apheresis Clinic staff considers a contraindication to the procedure.

For children, exclusion criteria include age less than 7 years, weigh less than 25 kilograms, inadequate peripheral access to insert needles for apheresis, and unable to undergo apheresis without sedation.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00562601

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
Investigators
Principal Investigator: Adriana R Marques, M.D. National Institute of Allergy and Infectious Diseases (NIAID)
  More Information

Additional Information:
Publications:
ClinicalTrials.gov Identifier: NCT00562601     History of Changes
Other Study ID Numbers: 870163, 87-I-0163
Study First Received: November 21, 2007
Last Updated: March 29, 2014
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Leukapheresis
Plasmapheresis
Lymphocytes
Neutrophils

ClinicalTrials.gov processed this record on July 26, 2014