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Esmaeilizand R, Rocha T, Harrison A, Gray S, Fusch G, Dolovich M, Mukerji A. Efficiency of budesonide delivery via a mesh nebulizer in an in-vitro neonatal ventilator model. Pediatr Pulmonol 2020; 55:2283-2288. [PMID: 32519801 DOI: 10.1002/ppul.24897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 01/15/2023]
Abstract
OBJECTIVE To determine the delivery efficiency of budesonide aerosol via a mesh nebulizer in a neonatal ventilator model. DESIGN/METHOD In an in-vitro ventilated neonatal model, budesonide suspension was administered using a mesh nebulizer. A collection filter was placed distal to the endotracheal tube and budesonide captured by the filter was measured using UV spectroscopy. The ventilator was, in turn, either on high frequency or conventional ventilation mode and the nebulizer was placed either proximal (close to the endotracheal tube) or distal (between the wet side of humidifier and the inspiratory circuit). Each combination (nebulizer position and ventilation mode) to assess budesonide delivery was tested five times. RESULTS Overall delivery of budesonide to the distal end of the endotracheal tube a small percentage of the total dose administered. The deposition with conventional ventilation was 2.12% (±1.06) and 1.26% (±0.27), with proximal and distal placement of the nebulizer, respectively. With high-frequency ventilation, the deposition percentages were 1.82% (±0.82) and 1.69% (±0.23), with proximal and distal nebulizer placement, respectively. CONCLUSION Only a small percentage of administered budesonide is delivered to the distal endotracheal tube, irrespective of ventilation mode, and nebulizer placement.
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Affiliation(s)
| | - Taciano Rocha
- Department of Physiotherapy, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Ava Harrison
- Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
| | - Shari Gray
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
| | - Gerhard Fusch
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
| | - Myrna Dolovich
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Amit Mukerji
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
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Clinical outcome associated with the use of different inhalation method with and without humidification in asthmatic mechanically ventilated patients. Pulm Pharmacol Ther 2017; 45:40-46. [PMID: 28435031 DOI: 10.1016/j.pupt.2017.04.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/27/2017] [Accepted: 04/19/2017] [Indexed: 11/20/2022]
Abstract
BACKGROUND Inhaled-medication delivered during mechanical-ventilation is affected by type of aerosol-generator and humidity-condition. Despite many in-vitro studies related to aerosol-delivery to mechanically-ventilated patients, little has been reported on clinical effects of these variables. The aim of this study was to determine effect of humidification and type of aerosol-generator on clinical status of mechanically ventilated asthmatics. METHOD 72 (36 females) asthmatic subjects receiving invasive mechanical ventilation were enrolled and assigned randomly to 6 treatment groups of 12 (6 females) subjects each received, as possible, all inhaled medication using their assigned aerosol generator and humidity condition during delivery. Aerosol-generators were placed immediately after humidifier within inspiratory limb of mechanical ventilation circuit. First group used vibrating-mesh-nebulizer (Aerogen Solo; VMN) with humidification; Second used VMN without humidification; Third used metered-dose-inhaler with AeroChamber Vent (MDI-AV) with humidification; Forth used MDI-AV without humidification; Fifth used Oxycare jet-nebulizer (JN) with humidification; Sixth used JN without humidification. Measured parameters included clinical-parameters reflected patient response (CP) and endpoint parameters e.g. length-of-stay in the intensive-care-unit (ICU-days) and mechanical-ventilation days (MV-days). RESULTS There was no significant difference between studied subjects in the 6 groups in baseline of CP. VMN resulted in trend to shorter ICU-days (∼1.42days) compared to MDI-AV (p = 0.39) and relatively but not significantly shorter ICU-days (∼0.75days) compared JN. Aerosol-delivery with or without humidification did not have any significant effect on any of parameters studied with very light insignificant tendency of delivery at humid condition to decrease MV-days and ICU-days. No significant effect was found of changing humidity during aerosol-delivery to ventilated-patient. CONCLUSIONS VMN to deliver aerosol in ventilated patient resulted in trend to decreased ICU-days compared to JN and MDI-AV. Aerosol-delivery with or without humidification did not have any significant effect on any of parameters studied. However, we recommend increasing the number of patients studied to corroborate this finding.
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Pitance L, Reychler G, Vecellio L, Leal T, Reychler H, Liistro G. Influence of Tracheostomy on Lung Deposition in Spontaneously Breathing Patients. J Aerosol Med Pulm Drug Deliv 2016; 29:454-460. [PMID: 26907544 DOI: 10.1089/jamp.2015.1245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Nebulized drugs are frequently administrated through tracheostomy in clinical routine. So far, the amount of drug deposited into the lung in these patients remains unknown. The aim of our pharmacokinetic study was to compare lung delivery of amikacin in the same subjects in two settings: spontaneously breathing through a tracheostomy and through the mouth. METHODS Lung delivery was measured by amikacin urinary drug concentration in nine patients who were transitory tracheostomized for the need of a head and neck oncologic surgery. Patients performed two nebulization sessions: with a mouthpiece (MB) and through tracheostomy (TB) using a adapted jet nebulizer (Sidestream®). RESULTS AND CONCLUSION Lung delivery was similar with the two conditions of nebulization (6.5 ± 2.5% vs. 6.3 ± 2.0% of the nominal mass of amikacin, respectively, for MB and TB; p = 0.95). Duration of nebulization was also comparable (19.7 ± 1.6 vs. 20.1 ± 1.8 min, respectively, for mouth and tracheostomy breathing; p = 0.307). The half-life and elimination rate constant were not different between the two settings. We conclude that nebulized therapy can be administered in spontaneously breathing tracheostomized adults patients, with a similar amount of drug delivered to the lung compared with spontaneously mouth breathing patients.
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Affiliation(s)
- Laurent Pitance
- 1 Department of Oral and Maxillofacial Surgery, Cliniques Universitaires Saint-Luc , Brussels, Belgium
- 2 Institut de Recherche Expérimentale and Clinique (IREC), Pôle Pneumologie, ORL & Dermatologie, Université catholique de Louvain (UCL) , Brussels, Belgium
| | - Grégory Reychler
- 2 Institut de Recherche Expérimentale and Clinique (IREC), Pôle Pneumologie, ORL & Dermatologie, Université catholique de Louvain (UCL) , Brussels, Belgium
- 3 Department of Pneumologie, Cliniques Universitaires Saint-Luc , Brussels, Belgium
| | - Laurent Vecellio
- 4 Faculté de Médecine, DTF-Aerodrug , Tours, France
- 5 Centre d'Etude des Pathologies Respiratoires INSERM U1100/EA6305, Université François Rabelais de Tours , Faculté de Médecine, Tours, France
| | - Teresinha Leal
- 2 Institut de Recherche Expérimentale and Clinique (IREC), Pôle Pneumologie, ORL & Dermatologie, Université catholique de Louvain (UCL) , Brussels, Belgium
- 6 Louvain Centre for Toxicology and Applied Pharmacology (LTAP)
| | - Hervé Reychler
- 1 Department of Oral and Maxillofacial Surgery, Cliniques Universitaires Saint-Luc , Brussels, Belgium
- 2 Institut de Recherche Expérimentale and Clinique (IREC), Pôle Pneumologie, ORL & Dermatologie, Université catholique de Louvain (UCL) , Brussels, Belgium
| | - Giuseppe Liistro
- 2 Institut de Recherche Expérimentale and Clinique (IREC), Pôle Pneumologie, ORL & Dermatologie, Université catholique de Louvain (UCL) , Brussels, Belgium
- 3 Department of Pneumologie, Cliniques Universitaires Saint-Luc , Brussels, Belgium
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Searcy RJ, Morales JR, Ferreira JA, Johnson DW. The role of inhaled prostacyclin in treating acute respiratory distress syndrome. Ther Adv Respir Dis 2015; 9:302-12. [PMID: 26294418 DOI: 10.1177/1753465815599345] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a syndrome of acute lung injury that is characterized by noncardiogenic pulmonary edema and severe hypoxemia second to a pathogenic impairment of gas exchange. Despite significant advances in the area, mortality remains high among ARDS patients. High mortality and a limited spectrum of therapeutic options have left clinicians searching for alternatives, spiking interest in selective pulmonary vasodilators (SPVs). Despite the lack of robust evidence, SPVs are commonly employed for their therapeutic role in improving oxygenation in patients who have developed refractory hypoxemia in ARDS. While inhaled epoprostenol (iEPO) also impacts arterial oxygenation by decreasing ventilation-perfusion (V/Q) mismatching and pulmonary shunt flow, this effect is not different from inhaled nitric oxide (iNO). The most effective and safest dose for yielding a clinically significant increase in PaO2 and reduction in pulmonary artery pressure (PAP) appears to be 20-30 ng/kg/min in adults and 30 ng/kg/min in pediatric patients. iEPO appears to have a ceiling effect above these doses in which no additional benefit may be derived. iNO and iEPO have shown similar efficacy profiles; however, they differ with respect to cost and ease of therapeutic administration. The most beneficial effects of iEPO have been seen in adult patients with secondary ARDS as compared with primary ARDS, most likely due to the difference in etiology of the two disease states, and in patients suffering from baseline right ventricular heart failure. Although iEPO has demonstrated improvements in hemodynamic parameters and oxygenation in ARDS patients, due to the limited number of randomized clinical trials and the lack of studies investigating mortality, the use of iEPO cannot be recommended as standard of care in ARDS. iEPO should be reserved for those refractory to traditional therapies.
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Affiliation(s)
- Randi J Searcy
- Department of Pharmacy, University of Florida Health Jacksonville, 655 West 8th Street, Jacksonville, FL 32209, USA
| | - James R Morales
- University of Florida Health Jacksonville, Jacksonville, Florida, USA
| | - Jason A Ferreira
- University of Florida Health Jacksonville, Jacksonville, Florida, USA
| | - Donald W Johnson
- University of Florida Health Jacksonville, Jacksonville, Florida, USA
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Holland A, Smith F, Penny K, McCrossan G, Veitch L, Nicholson C. Metered dose inhalers versus nebulizers for aerosol bronchodilator delivery for adult patients receiving mechanical ventilation in critical care units. Cochrane Database Syst Rev 2013; 2013:CD008863. [PMID: 23740736 PMCID: PMC6516804 DOI: 10.1002/14651858.cd008863.pub2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Nebulizers and metered dose inhalers (MDI) have both been adapted for delivering aerosol bronchodilation to mechanically ventilated patients, but there is incomplete knowledge as to the most effective method of delivery. OBJECTIVES To compare the effectiveness of nebulizers and MDIs for bronchodilator delivery in invasively ventilated, critically ill adults. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2012, Issue 5); Ovid MEDLINE (1950 to Week 19 2012); Ovid EMBASE (1980 to Week 19 2012); CINAHL via EBSCOhost (1982 to Week 19 2012) and reference lists of articles. We searched conference proceedings and reference lists of articles. We also contacted manufacturers and researchers in this field. There were no constraints based on language or publication status. SELECTION CRITERIA Randomized controlled trials (RCTs), including randomized cross-over trials where the order of the intervention was randomized, comparing the nebulizer and MDI for aerosol bronchodilation in mechanically ventilated adult patients in critical care units. DATA COLLECTION AND ANALYSIS Two authors independently assessed trial quality and extracted data. We contacted study authors for additional information where required. We collected information about adverse effects from the trials. MAIN RESULTS This review included three trials, two addressing the primary outcome measure of a reduction of airway resistance (measured as a reduction in interrupter and additional airway resistance) with a total of 28 patients (n =10, n =18) and two addressing adverse changes to haemodynamic observations with a total of 36 patients (n =18, n =18). Limitations in data availability and reporting in the included trials precluded meta-analysis and therefore the present review consisted of a descriptive analysis. Risk of bias in the included trials was judged as low or of unknown risk across the majority of items in the 'Risk of bias' tool.Cautious interpretation of the included study results suggests that nebulizers could be a more effective method of bronchodilator administration than MDI in terms of a change in resistance. No apparent changes to haemodynamic observations (measured as an increase in heart rate) were associated with either mode of delivery. Due to missing data issues, meta analyses were not possible. Additionally, small sample sizes and variability between the studies with regards to patient diagnoses, bronchodilator agent and administration technique mean that it would be speculative to infer definitive recommendations based on these results at this time. This is insufficient evidence to determine which is the most effective delivery system between nebuliser and MDI for aerosol bronchodilation in adult patients receiving mechanical ventilation. AUTHORS' CONCLUSIONS Existing randomized controlled trials, including randomized cross-over trials where the order of the intervention was randomized, comparing nebulizer and MDI for aerosol bronchodilation in mechanically ventilated adult patients do not provide sufficient evidence to support either delivery method at this time.
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Affiliation(s)
- Agi Holland
- School of Nursing, Midwifery and Social Care, Faculty of Health, Life & Social Sciences, Edinburgh Napier University, Edinburgh,UK.
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Albuterol delivery in an in vitro pediatric ventilator lung model: comparison of jet, ultrasonic, and mesh nebulizers. Pediatr Crit Care Med 2013; 14:e98-102. [PMID: 23287904 DOI: 10.1097/pcc.0b013e3182712783] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To determine the influence of nebulizer types and nebulization modes on bronchodilator delivery in a mechanically ventilated pediatric lung model. DESIGN In vitro, laboratory study. SETTING Research laboratory of a university hospital. INTERVENTIONS Using albuterol as a marker, three nebulizer types (jet nebulizer, ultrasonic nebulizer, and vibrating-mesh nebulizer) were tested in three nebulization modes in a nonhumidified bench model mimicking the ventilatory pattern of a 10-kg infant. The amounts of albuterol deposited on the inspiratory filters (inhaled drug) at the end of the endotracheal tube, on the expiratory filters, and remaining in the nebulizers or in the ventilator circuit were determined. Particle size distribution of the nebulizers was also measured. MEASUREMENTS AND MAIN RESULTS The inhaled drug was 2.8% ± 0.5% for the jet nebulizer, 10.5% ± 2.3% for the ultrasonic nebulizer, and 5.4% ± 2.7% for the vibrating-mesh nebulizer in intermittent nebulization during the inspiratory phase (p < 0.01). The most efficient nebulizer was the vibrating-mesh nebulizer in continuous nebulization (13.3% ± 4.6%, p < 0.01). Depending on the nebulizers, a variable but important part of albuterol was observed as remaining in the nebulizers (jet and ultrasonic nebulizers), or being expired or lost in the ventilator circuit (all nebulizers). Only small particles (range 2.39-2.70 µm) reached the end of the endotracheal tube. CONCLUSIONS Important differences between nebulizer types and nebulization modes were seen for albuterol deposition at the end of the endotracheal tube in an in vitro pediatric ventilator-lung model. New aerosol devices, such as ultrasonic and vibrating-mesh nebulizers, were more efficient than the jet nebulizer.
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Pitance L, Vecellio L, Delval G, Reychler G, Reychler H, Liistro G. Aerosol delivery through tracheostomy tubes: an in vitro study. J Aerosol Med Pulm Drug Deliv 2012; 26:76-83. [PMID: 22691111 DOI: 10.1089/jamp.2011.0962] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Our study investigated the influence of the cannula's inner diameter (ID) and of its removal on the expected respiratory dose of amikacin, using three different jet nebulizer configurations (Sidestream(®)): vented (N1), unvented with a piece of corrugated tubing attached to the expiratory limb of the T attachment (N2), and unvented alone (N3). METHODS The jet nebulizer was filled with amikacin (500 mg/4 mL) and was attached to the tracheostomy tube. A lung model simulating spontaneous breathing was connected to the tracheostomy tube. A filter was connected between the nebulizer and the tracheostomy tube to measure the inhaled dose, and between the tracheostomy tube and the lung model to measure the respiratory dose. Different cannula IDs were tested (6.5, 8, 8.5, and 10 mm), and aerosol lost in the cannulas was determined. RESULTS AND CONCLUSIONS Respiratory dose varied between 96±1 mg and 44±3 mg, with higher values observed with N2. The aerosol lost in the cannula was significant and represented up to 63% of the inhaled dose. There was a negative correlation between the cannula's ID and the aerosol lost in the cannula. After removal of the internal cannula, an increase in the respiratory dose of up to 31.3% was observed. We recommend removing the inner tracheostomy cannula to nebulize a larger amount of drug through a tracheostomy tube. Among the three jet nebulizer configurations studied, we recommend the unvented one with a piece of corrugated tubing attached to the expiratory limb of the T attachment.
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Affiliation(s)
- L Pitance
- Oral and Maxillofacial Surgery Unit, Université Catholique de Louvain, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium
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Calvert LD, Jackson JM, White JA, Barry PW, Kinnear WJ, O'Callaghan C. Enhanced delivery of nebulised salbutamol during non-invasive ventilation. J Pharm Pharmacol 2010; 58:1553-7. [PMID: 17132219 DOI: 10.1211/jpp.58.11.0017] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Non-invasive ventilation (NIV) is used to treat acute respiratory failure. Nebulised drugs can be delivered concurrently with NIV or during breaks from ventilatory support. We hypothesised that the amount of nebulised salbutamol inhaled when delivered via bi-level ventilation would be no different to the amount available directly from the same nebuliser. A standard bi-level ventilation circuit was attached to a lung model simulating adult respiration. Drug delivery was compared when salbutamol (5 mg) was nebulised at different positions in the circuit and separately, with no ventilator. The amount of salbutamol contained in various particle size fractions was also determined. Nebuliser position within the NIV circuit was critically important for drug delivery. Optimal delivery of salbutamol occurred with the expiration port between the facemask and nebuliser (647 ± 67 μg). This was significantly better than nebulisation without the ventilator (424 ± 61 μg; P < 0.01). Delivery when the nebuliser was positioned between the facemask and expiration port was 544 ± 85 μg. The amount of salbutamol contained in particles < 5 μm was significantly increased when the nebuliser was used in conjunction with bi-level ventilation (576 ± 60 μg vs 300 ± 43 μg, P < 0.001). We conclude that nebulised bronchodilator therapy, using a Cirrus jet nebuliser, during bi-level ventilation increases respirable particles likely to be inhaled when the nebuliser is optimally positioned within the circuit.
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Affiliation(s)
- Lori D Calvert
- Department of Respiratory Medicine, University Hospital Nottingham, Derby Road, Nottingham, UK.
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Domínguez-Cherit G, Posadas-Calleja JG, Borunda D. Chronic Obstructive Pulmonary Disease. Crit Care Med 2008. [DOI: 10.1016/b978-032304841-5.50042-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Di Paolo ER, Pannatier A, Cotting J. In vitro evaluation of bronchodilator drug delivery by jet nebulization during pediatric mechanical ventilation. Pediatr Crit Care Med 2005; 6:462-9. [PMID: 15982436 DOI: 10.1097/01.pcc.0000162452.68144.27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine the influence of jet nebulizer brands and nebulization mode on albuterol delivery in a mechanically ventilated pediatric lung model. DESIGN In vitro, laboratory study. SETTING Research laboratory of a university hospital. INTERVENTIONS Using albuterol as a marker, six jet nebulizers (Microneb NA420, Sidestream, Acorn II, Cirrus, Upmist, Micro Mist) were tested in four nebulization modes in a bench model mimicking the ventilatory pattern of a 10-kg infant (Galileo ventilator, Hamilton Medical). The amounts of albuterol deposited on the inspiratory filters at the end of the endotracheal tube were determined, as well as the pressure, flow profiles, and particle size distribution of the jet nebulizers. MEASUREMENTS AND MAIN RESULTS Pooling the data of the six jet nebulizer brands (n = 30) indicated that intermittent nebulization during the expiratory phase was more efficient (6.5 +/- 2.5% of the initial dose, p < .001) than intermittent nebulization during the inspiratory phase (1.9 +/- 1.2%) and continuous nebulization with air from the ventilator (4.0 +/- 1.5%) or from an external source (4.2 +/- 1.4%). The particle size distribution at 6 L x min(-1) was between 2.81 and 3.30 microm. CONCLUSIONS In our in vitro pediatric lung model, the quantity of inhaled drug was low. Jet nebulizer brands and nebulization modes significantly affected drug delivery, and in vitro models designed for adults cannot be extrapolated to infants.
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Affiliation(s)
- Ermindo R Di Paolo
- Department of Pharmacy, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
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Dahlem P, van Aalderen WMC, de Neef M, Dijkgraaf MGW, Bos AP. Randomized controlled trial of aerosolized prostacyclin therapy in children with acute lung injury. Crit Care Med 2004; 32:1055-60. [PMID: 15071401 DOI: 10.1097/01.ccm.0000120055.52377.bf] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To investigate whether aerosolized prostacyclin improves oxygenation in children with acute lung injury. DESIGN Double-blind, randomized, and placebo-controlled trial. SETTING Pediatric intensive care unit at a university hospital. PATIENTS Fourteen children with acute lung injury defined by the criteria of an American-European Consensus Conference. INTERVENTIONS Aerosolized prostacyclin (epoprostenol sodium) by stepwise increments of different doses (10, 20, 30, 40, and 50 ng x kg x min) vs. aerosolized normal saline (placebo). MEASUREMENTS AND MAIN RESULTS Before the start of the study, and before and after each dose of prostacyclin/placebo, the following variables were measured: arterial blood gases, heart rate, mean arterial blood pressure, and ventilator settings required. Changes in oxygenation were measured by calculation of the oxygenation index (mean airway pressure x 100 x Pao2/Fio2). After treatment with aerosolized prostacyclin, there was a significant 26% (interquartile range, 3%, 35%) improvement in oxygenation index at 30 ng x kg x min compared with placebo (p =.001). The response to prostacyclin was not the same in all children. We saw an improvement of > or = 20% in eight of 14 children (i.e., responders), and the number needed to treat was 1.8 (95% confidence interval, 1.2-3.2). No adverse effects were observed. CONCLUSIONS Aerosolized prostacyclin improves oxygenation in children with acute lung injury. Future trials should investigate whether this treatment will positively affect outcome.
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Affiliation(s)
- Peter Dahlem
- Division of Pediatric Intensive Care, Department of Pediatrics, Emma Children's Hospital, Academic Medical Center of the University of Amsterdam, The Netherlands
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Kelly HW, Keim KA, McWilliams BC. Comparison of two methods of delivering continuously nebulized albuterol. Ann Pharmacother 2003; 37:23-6. [PMID: 12503928 DOI: 10.1345/aph.1c075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To compare the relative delivery of 2 methods for providing continuously nebulized albuterol (CNA): a small-volume nebulizer plus infusion pump versus a large-volume nebulizer. DESIGN An open, randomized comparison of 3 hours of CNA administration using an in vitro lung model with a follow-up particle size assessment of the large-volume nebulizer. METHODS Six different nebulizers of each type were connected to a lung model via a volume-limited mechanical ventilator and infant ventilator circuitry. Albuterol was nebulized at 10 mg/h for 3 hours in random order. The small-volume nebulizer used was the Airlife Misty Neb (Baxter, Valencia, CA); the large-volume nebulizer was the HEART Nebulizer (Vortran Medical, Orangevale, CA). One large-volume nebulizer was operated over 8 hours for the output and particle sizing study. RESULTS The small-volume nebulizer delivered a greater amount of albuterol (mean +/- SD percentage of total nebulized) to the model lung (5.75 +/- 1.38% vs. 4.12 +/- 0.67%; p < 0.025) than the large-volume nebulizer, but demonstrated greater variability. Although total output was not maintained after 8 hours of nebulization with the large-volume nebulizer, the percent of particles in the respirable range remained consistent. CONCLUSIONS The large-volume nebulizer evaluated in this study maintains consistent output up to 8 hours and provides an acceptable method for delivering CNA through an infant ventilator circuit.
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Affiliation(s)
- H William Kelly
- Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-5311, USA.
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Sherman JM, Davis S, Albamonte-Petrick S, Chatburn RL, Fitton C, Green C, Johnston J, Lyrene RK, Myer C, Othersen HB, Wood R, Zach M, Zander J, Zinman R. Care of the child with a chronic tracheostomy. This official statement of the American Thoracic Society was adopted by the ATS Board of Directors, July 1999. Am J Respir Crit Care Med 2000; 161:297-308. [PMID: 10619835 DOI: 10.1164/ajrccm.161.1.ats1-00] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Guerin C, Chevre A, Dessirier P, Poncet T, Becquemin MH, Dequin PF, Le Guellec C, Jacques D, Fournier G. Inhaled fenoterol-ipratropium bromide in mechanically ventilated patients with chronic obstructive pulmonary disease. Am J Respir Crit Care Med 1999; 159:1036-42. [PMID: 10194143 DOI: 10.1164/ajrccm.159.4.9710081] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In 18 patients with chronic obstructive pulmonary disease intubated and mechanically ventilated, we prospectively randomized 200 micrograms fenoterol-80 micrograms ipratropium bromide (four puffs) from a metered-dose inhaler (MDI) versus 1.25 mg fenoterol-500 micrograms ipratropium bromide in 5 ml saline from a nebulizer (NEB). Respiratory mechanics were assessed before and 30 min after the end of each delivery by the rapid end-inspiratory airway occlusion technique. We did vary on single breaths the inflation flow (V) from 0.2 to 1.2 L. s-1, at constant inflation volume. The total respiratory resistance of the respiratory system (Rrs) was partitioned into airway (Rint,rs) and tissue (DeltaRrs) resistances. We found that Rrs was equivalently reduced, from 16.49 +/- 1.37 to 14.85 +/- 1.88 cm H2O. L-1. s with MDI (p < 0.05) and from 18.04 +/- 1.85 to 15.15 +/- 1.33 cm H2O. L-1. s with NEB (p < 0.01). Whereas the prevailing effect of MDI was to reduce Rint,rs, that of NEB was to decrease DeltaRrs. In addition, the V resistance of the respiratory system over the whole range of V was significantly affected by NEB but not by MDI.
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Affiliation(s)
- C Guerin
- Service de Réanimation Médicale, Centre Hospitalier Lyon-Sud, Pierre-Bénite, Service Central d'Explorations Fonctionnelles Respiratiores, Groupe Hospitalier Pitié-Salpétriére, Paris, France
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