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Pilot Study About the Harmful Effects of Blood Storage on Overweight People and the Role of iNO in This Setting

This study has been completed.
Information provided by (Responsible Party):
Warren M. Zapol, Massachusetts General Hospital Identifier:
First received: February 6, 2012
Last updated: February 8, 2017
Last verified: February 2017
The purpose of this study is to determine whether storage time affects how human body responds to autologous blood transfusion. An autologous blood transfusion is when a person donates blood and then receives that same blood back in the transfusion. We also want to find out if in this situation inhaled nitric oxide can help to prevent the potential reduction of vasodilation capacity. Vasodilation capacity is the ability of the blood vessel to widen when needed.

Condition Intervention Phase
Blood Transfusion
Endothelial Physiopathology
Nitric Oxide
Pulmonary Hypertension
Procedure: Red blood Cells auto-transfusion
Drug: Inhaled Nitric Oxide (iNO) administration
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Outcomes Assessor
Primary Purpose: Basic Science
Official Title: Effects of Stored Red Blood Cell Transfusion in Overweight Subjects With Endothelial Dysfunction: Influence of Inhaled Nitric Oxide (iNO)

Resource links provided by NLM:

Further study details as provided by Massachusetts General Hospital:

Primary Outcome Measures:
  • Systolic Pulmonary Artery Pressure [ Time Frame: Post-transfusion ]
    Pulmonary vasoconstriction was measured by estimation of Systolic Pulmonary Artery Pressure in millimeter of mercury (mmHg) by trans-thoracic echocardiography

Secondary Outcome Measures:
  • Reactive Hyperemia Index [ Time Frame: Post-transfusion ]
    Reactive Hyperemia Index (RHI) is assessed by digital pulse amplitude tonometry and it is a sensitive indicator of endothelial function. RHI is a calculated as a ratio between tested versus contralateral finger dilatation, thus there is no unit measure.

Enrollment: 14
Study Start Date: March 2012
Study Completion Date: December 2013
Primary Completion Date: December 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Fresh blood Procedure: Red blood Cells auto-transfusion
Withdrawal from 14 overweight volunteers of one unit of red blood cells and auto-transfusion after 3 days storage time. The same 14 subjects will be included in every arm of the study.
Experimental: Old blood Procedure: Red blood Cells auto-transfusion
Withdrawal from the same 14 overweight volunteers of one unit of red blood cells and auto-transfusion after 40 days storage time.
Experimental: Old blood + inhaled Nitric Oxide Procedure: Red blood Cells auto-transfusion
Withdrawal from the same 14 overweight volunteers of one unit of red blood cells and auto-transfusion after 40 days storage time.
Drug: Inhaled Nitric Oxide (iNO) administration
Subjects will breath iNO (80ppm) for 10 minutes before, during and for one hour after the autologous old-blood transfusion.

Detailed Description:

The objective of this study is to assess effects of the storage of PRBC on pulmonary vasoconstriction measured as increase in pulmonary artery pressure and endothelial function measured as a change in reactive hyperemia index in overweight people with existing endothelial dysfunction at baseline.

The present study consists of three different parts, which will be scheduled in a randomized order on the same subject (crossover study).

During one phase of the study, 14 healthy human volunteers will donate a unit of Packed Red Blood Cells (PRBC), which will be leukoreduced and stored in Additive Solutions-1 (AS-1), and then transfused back to the subjects after 3 days of storage at 4º C in the MGH Blood Bank (Fresh Blood arm). The second part of the study consists in the collection of another unit of PRBC from the same volunteers which will be transfused back to them after 40 days of storage (Old Blood arm). Finally in the third part, like in the second one, one unit of PRBC will be withdraw and stored for 40 days, but 80 ppm (parts per million by volume) Nitric Oxide in air will be administered together with the transfusion. There will be a 2 weeks interval after each PRBC transfusion.

We hypothesize that old red blood cells stored under conventional conditions may trigger a complex, pro-inflammatory, pro-thrombotic and vasoconstriction response. We will compare the response to PRBC stored for 3 days with the response to PRBC stored for 40 days in the same healthy volunteers. We also want to test the hypothesis that inhaled nitric oxide may reverse these adverse effects.

We will monitor/measure the following parameters:

  1. Pulmonary vasoconstriction by trans-thoracic echocardiography
  2. Endothelium-mediated changes in vascular (arterial) tone, measured as reactive hyperemia index.

Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Have a photo ID
  2. Age>18 years old (required to provide informed consent)
  3. Age <60 years old
  4. Mild impairment of endothelial function, assessed by post ischemic vasodilation (L_RHI,<0.7) (38)
  5. Body mass index (BMI) >27 kg/m^2 and <40 kg/m^2
  6. Fasting during the days of transfusion.
  7. Avoiding intake of high nitrate food (i.e. green leafy vegetables: lettuce, spinach) on the day prior to the study
  8. Feel well on the day of blood donation
  9. KG within normal limits
  10. Normotensive (systolic blood pressure <140 mmHg and diastolic <90 mmHg)
  11. Normal physical exam and blood test results as indicated by:

    1. WBC 4.5-11.0 n x103/μL
    2. HGB 12.0-17.5 gm/dl
    3. PLT 150-400 n x103/μL
    4. Plasma Sodium 135-145 mmol/L
    5. Plasma Potassium 3.4-4.8 mmol/L
    6. Plasma Chloride 98-108 mmol/L
    7. Plasma Carbon Dioxide 23.0-31.9 mmol/L
    8. Plasma Urea Nitrogen 8-25 mg/dl
    9. Plasma Creatinine 0.60-1.50 mg/dl
    10. Plasma Glucose 70-110 mg/dl
    11. Transaminase-SGPT 10-55 U/L
    12. Transaminase-SGOT 10-40 U/L
    13. Total Bilirubin < 2 mg/dl
    14. Fasting plasma glucose < 110 mg/dl
    15. Methemoglobin < 3%

Exclusion Criteria:

  1. Psychiatric disturbances such as anxiety, depression, schizophrenia requiring pharmacological treatment or hospitalization in the last year
  2. Systemic disease with or without any functional limitation
  3. Pregnancy determined by urine pregnancy test, detecting presence of human chorionic gonadotropin (hCG), or less than six weeks postpartum
  4. Active smoking. Volunteers may be enrolled if they quit smoking for more than 1 year.
  5. Excess alcohol use: more than ½ L/day of wine consumption or equivalent
  6. Any current use of a medication other than: over-the-counter oral medications, herbal remedies, nutritional supplements, and oral contraceptives.
  7. Antibiotic use within 48 hours of blood donation
  8. Use of NSAIDS, corticosteroids, aspirin during the past 7 days
  9. Dental work within 24 hours prior to the donation
  10. Received or donated blood in the last 4 months
  11. Have had any forms of cancer with the exceptions of basal cell skin cancer or treatment for in situ uterine cervical cancer
  12. Currently enrolled in another research study
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Please refer to this study by its identifier: NCT01529502

United States, Massachusetts
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
Principal Investigator: Warren Zapol, MD Masachusetts General Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Warren M. Zapol, Emeritus Anesthetist-in-Chief and Director of the MGH Anesthesia Center for Critical Care Research, Massachusetts General Hospital; Reginald Jenney Professor of Anesthesia, Harvard Medical School, Massachusetts General Hospital Identifier: NCT01529502     History of Changes
Other Study ID Numbers: Blood Study Overweight
Study First Received: February 6, 2012
Results First Received: October 26, 2016
Last Updated: February 8, 2017
Individual Participant Data  
Plan to Share IPD: No

Keywords provided by Massachusetts General Hospital:
Blood Transfusion, Autologous
Blood Preservation/adverse effects
Blood Transfusion/adverse effects
Endothelium, Vascular/physiopathology
Nitric Oxide
Pulmonary Hypertension

Additional relevant MeSH terms:
Hypertension, Pulmonary
Vascular Diseases
Cardiovascular Diseases
Body Weight
Signs and Symptoms
Lung Diseases
Respiratory Tract Diseases
Nitric Oxide
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents
Free Radical Scavengers
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Endothelium-Dependent Relaxing Factors
Vasodilator Agents
Protective Agents processed this record on April 27, 2017