Related Experiment Videos
Haemophilia, AIDS and lung epithelial permeability
M J O'Doherty1, C J Page, C Harrington
1Department of Nuclear Medicine, Rayne Institute, St. Thomas' Hospital, London, U.K.
European Journal of Haematology
|April 1, 1990
Summary
Lung epithelial permeability, measured by 99mTc DTPA transfer, is increased in HIV-positive smokers and nonsmokers with Pneumocystis pneumonia. This noninvasive test aids in PCP diagnosis and reassessment, reducing costs.
Area of Science:
- Pulmonary Medicine
- Nuclear Medicine
- Infectious Diseases
Background:
- HIV-positive individuals, particularly those with hemophilia, are susceptible to lung complications.
- Assessing lung epithelial permeability is crucial for diagnosing and managing pulmonary conditions in this population.
- Traditional methods like bronchoscopy can be invasive and costly.
Purpose of the Study:
- To evaluate lung epithelial permeability using 99mTc DTPA transfer in HIV-positive hemophiliacs.
- To assess the utility of this method in diagnosing Pneumocystis pneumonia (PCP) and monitoring treatment response.
- To determine the cost-effectiveness of DTPA lung transfer as a diagnostic tool.
Main Methods:
- 99mTc DTPA lung transfer was measured in HIV-positive smokers, nonsmokers, and patients with PCP.
- Lung epithelial permeability was assessed by measuring the half-time of DTPA transfer (T50).
- Transfer curves were analyzed for monoexponential or biphasic patterns.
Main Results:
- Smokers showed faster DTPA transfer than nonsmokers.
- HIV-positive nonsmokers exhibited increased permeability at lung bases compared to controls.
- PCP patients demonstrated rapid, biphasic DTPA transfer, which normalized post-treatment.
Conclusions:
- 99mTc DTPA lung transfer is a sensitive indicator of altered lung epithelial permeability in HIV-positive individuals.
- This noninvasive method can aid in early PCP diagnosis and treatment monitoring, potentially avoiding bronchoscopy.
- The DTPA lung transfer study offers a cost-effective, outpatient-friendly approach for evaluating respiratory symptoms in HIV-positive hemophiliacs.