- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00584077
Assessment of Cough Reflex in Lung Transplant Recipients
Aperçu de l'étude
Statut
Les conditions
Description détaillée
Bronchoscopy Stable, lung transplant recipients undergoing surveillance bronchoscopy will be enrolled. We will exclude subjects with new or persistent cough, hypoxemia, new radiographic infiltrates, or hemodynamic instability.
Before bronchoscopy, patients will receive diazepam while codeine and atropine will be withheld. Upper airway anesthesia was performed using cotton swabs soaked with 4 % lidocaine applied on the oropharyngeal mucosa and gradually placed posteriorly with the aid of curved foreceps to anesthetize the supraglottic region. A trained individual will perform topical upper airway anesthesia over 15 minutes and adequate anesthesia will be determined once subjects fail to cough during foreceps application to the supraglottic region. Conscious sedation will be administered using intravenous midazolam while vital signs are monitored. Once adequate sedation is achieved, the bronchoscope will be introduced through the mouth beyond the vocal chords to the main carina and slowly advanced to the airway anastomosis. Coughing that occurs with advancement of the bronchoscope from the chords to the anastomosis will be addressed by maintaining the bronchoscope in an immobile neutral position for 60-180 seconds until coughing stops and the cough provocation will be performed.
Cough provocation Airway irritants will be applied in the following sequence: 1) one cm distal to anastomosis, 2) one cm proximal to anastomosis and 3) at the main carina. Chemical irritation will consist of 3 mL aliquots of 5 % dextrose water (D5W) instilled through the bronchoscope channel on the bronchial mucosa (21). Aliquots of D5W will be administered at each site on three separate occasions with a 60 second interval between administrations. Mechanical irritation will involve placement of the biopsy foreceps on the bronchial mucosa at each site. The sequence of airway irritation sites will always begin with the distal anastomosis followed by the proximal anastomosis and main carina.
Airway lidocaine administration Patients demonstrating a cough reflex at the distal anastomotic site will be recorded. After measurements are obtained at all airway sites, the bronchoscope will be reintroduced to the distal anastomosis and 3 mL of 4 % lidocaine instilled on the bronchial mucosa. Sixty seconds later, mechanical and chemical irritation of the proximal and distal anastomosis will be performed as previously outlined.
Cough assessment Cough frequency will be determined by counting audible coughs and abdominal muscle contractions measured with a surface electromyograph (EMG) recorder. Surface electrodes placed on the skin, 2 cm below each costal margin along the midclavicular line will be connected to an EMG recorder (Biopac Systems Inc, Santa Barbara, CA) linked to a dedicated computer. Continuous EMG recordings will be obtained 15 seconds before administration of the airway irritant to ensure absence of cough before airway irritant administration (Figure 1). Twenty seconds or more of recording will be obtained after airway irritant application. Cough will be defined as abdominal muscle contraction and audible expiratory sound.
Type d'étude
Inscription (Réel)
Contacts et emplacements
Lieux d'étude
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Texas
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Galveston, Texas, États-Unis, 77555
- University of Texas Medical Branch
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- Lung transplant recipient
- Hemodynamically stable
- Capable of undergoing bronchoscopy
Exclusion Criteria:
- Pneumonia
- Hypoxemia (PaO2 < 70)
- Hemodynamic instability
- Coagulopathy
- Thrombocytopenia
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
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Stable lung transplant recipients
All enrolled subjects receive the same procedures; bronchoscopy with administration of mechanical and chemical irritants to the airway mucosa
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Number of Coughs
Délai: 15-20 minutes
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The number of coughs elicited by placement of biopsy forceps or instillation of dextrose solution on the airway mucosa.
The presence of the cough reflex will be assessed with administration of mechanical (biopsy foreceps) and chemical (D5W) at the level of the main carina, proximal to airway anastomosis (native airway) and distal to the airway anastomosis (allograft airway).
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15-20 minutes
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
to Assess the Presence and Strength of the Cough Reflex in the Lower Airway for up to One Year
Délai: 15-20 minutes
|
Presence of cough as elicited by placement of biopsy forceps or instillation of dextrose solution on the airway mucosa. The presence of the cough reflex will be assessed with administration of mechanical (biopsy foreceps) and chemical (dextrose solution) at the level of the main carina, native lung airway and proximal and distal to the airway anastomosis. Lung transplant recipients underwent airway evaluations using the above protocel at 1.5 and 12 months after lung transplantation. after undergoing transplantation |
15-20 minutes
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Collaborateurs et enquêteurs
Publications et liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
- 00-132
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
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