Logo Medical Science Monitor

Call: +1.631.470.9640
Mon - Fri 10:00 am - 02:00 pm EST

Contact Us

Logo Medical Science Monitor Logo Medical Science Monitor Logo Medical Science Monitor

28 January 2003

The influence of acute hypercapnia on the quantity and oxidative metabolism of bronchoalveolar lavage-derived leukocytes in the mechanically ventilated rabbit.

Hanna Billert, Leon Drobnik, Arystarch Makowski

Med Sci Monit 2003; 9(1): BR8-15 :: ID: 4790

Abstract

BACKGROUND: Permissive hypercapnia exerts a protective influence in tissue injury, possibly by attenuating free radical activity. Increased CO2 concentrations may decrease the production of phagocyte reactive oxygen intermediates (ROI). In this study, we used bronchoalveolar lavage (BAL) to determine whether isooxic permissive hypercapnia due to hypoventilation would influence neutrophil recruitment into alveolar spaces and ROI production of BAL phagocytes, as measured by luminol dependent chemiluminescence. MATERIAL/METHODS: 27 Chinchilla rabbits randomized into three groups: control group (C; n=7), normocapnia (NC; n=10), and hypercapnia (HC; n=10) were anaesthetized with pentobarbitone and intubated. Bronchoalveolar lavage was obtained either after intubation (controls) or after mechanical ventilation lasting 240 minutes under normocapnia or permissive hypercapnia conditions. BAL cells were counted and luminol-dependent chemiluminescence estimations were performed. RESULTS: The BAL neutrophil count was significantly higher in the hypercapnia group than in normocapnia animals. The chemiluminescence of opsonized zymosan-stimulated cells was significantly higher in the normocapnia group than in the controls; the differences between the HC and NC animals, and between the HC and control animals, did not reach statistical significance. CONCLUSIONS: In the mechanically ventilated rabbit under pentobarbitone anaesthesia, acute isooxic hypercapnia due to hypoventilation increases neutrophil BAL count, without direct impact on mixed BAL-cell chemiluminescence; moreover, conventional ventilation increases the chemiluminescence of opsonized zymosan-stimulated BAL cells

Keywords: Hypercapnia - pathology

Add Comment 0 Comments

Editorial

01 April 2024 : Editorial  

Editorial: Forty Years of Waiting for Prevention and Cure of HIV Infection – Ongoing Challenges and Hopes for Vaccine Development and Overcoming Antiretroviral Drug Resistance

Dinah V. Parums

DOI: 10.12659/MSM.944600

Med Sci Monit 2024; 30:e944600

0:00

In Press

06 Mar 2024 : Clinical Research  

Enhanced Surgical Outcomes of Popliteal Cyst Excision: A Retrospective Study Comparing Arthroscopic Debride...

Med Sci Monit In Press; DOI: 10.12659/MSM.941102  

06 Mar 2024 : Clinical Research  

Prevalence and Variation of Medical Comorbidities in Oral Surgery Patients: A Retrospective Study at Jazan ...

Med Sci Monit In Press; DOI: 10.12659/MSM.943884  

08 Mar 2024 : Clinical Research  

Evaluation of Foot Structure in Preschool Children Based on Body Mass

Med Sci Monit In Press; DOI: 10.12659/MSM.943765  

15 Apr 2024 : Laboratory Research  

The Role of Copper-Induced M2 Macrophage Polarization in Protecting Cartilage Matrix in Osteoarthritis

Med Sci Monit In Press; DOI: 10.12659/MSM.943738  

Most Viewed Current Articles

17 Jan 2024 : Review article  

Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron Variant

DOI :10.12659/MSM.942799

Med Sci Monit 2024; 30:e942799

0:00

14 Dec 2022 : Clinical Research  

Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase Levels

DOI :10.12659/MSM.937990

Med Sci Monit 2022; 28:e937990

0:00

16 May 2023 : Clinical Research  

Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...

DOI :10.12659/MSM.940387

Med Sci Monit 2023; 29:e940387

0:00

01 Jan 2022 : Editorial  

Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...

DOI :10.12659/MSM.935952

Med Sci Monit 2022; 28:e935952

0:00

Your Privacy

We use cookies to ensure the functionality of our website, to personalize content and advertising, to provide social media features, and to analyze our traffic. If you allow us to do so, we also inform our social media, advertising and analysis partners about your use of our website, You can decise for yourself which categories you you want to deny or allow. Please note that based on your settings not all functionalities of the site are available. View our privacy policy.

Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750