Bonnes pratiques de l’aérosolthérapie par nébulisation

[Good practice for aerosol therapy by nebulization in 2020]

Nebulization is a drug delivery mode whose prescription and application remain uncertain. A guide to good practice has been proposed by the work group on aerosol therapy of the French Society for Respiratory Diseases, so-called GAT. The previous recommendations date from 2007. In addition to an update of data on nebulization, these expert recommendations aim to be of real help to the prescriber.

The medical uses of manosonic nebulizers (AMSA®) in 2018

AIMS

The purpose of repeated application of manosonic nebulizers (AMSA®) is to ensure active Eustachian tube rehabilitation and optimal middle-ear drug diffusion. In response to recent changes in marketing authorizations issued by the French National Drug Safety Agency (ANSM), the present study investigated how AMSA® is used in the Auvergne-Rhône-Alpes Region of France.

MATERIAL AND METHODS

A prospective non-interventional regional 1-year survey was conducted in 701 general practitioners and community and hospital ENT physicians in the Auvergne-Rhône-Alpes Region, using a questionnaire sent by mail with a reminder at 2 months. Percentage responses were compared on Chi² test with alpha risk of 5%. Non-respondents were excluded.

ENDPOINTS

The main endpoints were rate of AMSA® prescription, and prescription modalities in a specific geographical territory (Auvergne-Rhône-Alpes Region) in 2018.

RESULTS

93% of the 114 respondents prescribed AMSA®, with 4,000 prescriptions in 1 year. 66.7% prescribed this treatment to avoid recourse to myringotomy. Mean treatment duration was 2 weeks (50.9% of respondents). The most frequent nebulized substance was saline serum (68.4% of respondents), sometimes associated to corticosteroids or mucolytics.

CONCLUSION

The majority of physicians in the Auvergne-Rhône-Alpes Region, and notably the ENT physicians, were AMSA® prescribers for the treatment of Eustachian tube dysfunction and its consequences. However, the duration and modalities of use of AMSA® were very heterogeneous, and further studies are needed to standardize prescription.

The influenza virus, SARS-CoV-2, and the airways: Clarification for the otorhinolaryngologist

The influenza virus and SARS-CoV-2 cause trivial upper and severe lower respiratory infections (Influenza virus 290,000 to 650,000 deaths/year). These viruses come into contact with the airways either by direct projection, by secondary inhalation of airborne droplets, or by handling (fomites). The objective of this article is to clarify the mechanisms of production and penetration of droplets of secretions emitted during all expiratory phenomena likely to transport these viruses and come into contact with the respiratory mucosa. The droplets>5μm follow the laws of ballistics, those<5μm follow Brownian motion and remain suspended in the air. The aerosols of droplets are very heterogeneous whether the subject is healthy or sick. During an infectious period, not all droplets contain viral RNA. If these RNAs are detectable around patients, on surfaces, and in the ambient air at variable distances according to the studies (from 0.5m to beyond the patient's room), this is without prejudice to the infectious nature (viability) of the virus and the minimum infectious dose. There is a time lag between the patient's infectious period and that of RNA detection for both viruses. Subsequently, the inhaled particles must meet the laws of fluid dynamics (filtration) to settle in the respiratory tree. All of this partly explains the contagiousness and the clinical expression of these two viruses from the olfactory cleft to the alveoli.

[Assessment of physicians' and nurses' knowledge and practices of aerosol therapy]

INTRODUCTION

Aerosol therapy is an efficient, but complex procedure. National and international practice guidelines are regularly updated. However, only a few studies have assessed the application of guidelines by users. The aim of this study is to assess the knowledge and practices of physicians and nurses regarding these guidelines.

METHODS

Two self-administered questionnaires were designed by a working team and presented to physicians and nurses of four university hospitals in Paris. A pharmacy resident collected and analyzed the data with the aid of an online survey website.

RESULTS

A total of 481 physicians and nurses completed the questionnaires (33 % of physicians and 67 % of nurses). Only 241/480 physicians and nurses (50 %) knew that several intravenous drugs cannot be nebulized. Ninety-four of 422 (22 %) of them always choose oxygen as the driving gas and 239/311 nurses (77 %) think that single use nebulizers can be re-used for the same patient.

CONCLUSIONS

This survey shows that many physicians and nurses lack knowledge and use inappropriate practices. Based on these results, a booklet has been designed by the working team. This booklet should help health professionals to harmonize practices across hospitals and to follow the guidelines correctly.

[Health care providers' knowledge and abilities to use inhalation devices and spacers]

INTRODUCTION

Inhaled therapy is the mainstay of asthma treatment due to its local and rapid action. However, its efficiency relies on the teaching of a good inhalation technique by health care providers. We assessed health care providers' knowledge and practical skills in the use of inhalation devices.

METHODS

An observational multicenter study was conducted in the pulmonology and paediatric wards in Marseille. The departments' common practices, theoretical knowledge and practical skills were assessed through a questionnaire and a demonstration using a spacer device.

RESULTS

Forty health care providers were interviewed (9 attending physicians, 14 residents, 16 nurses and 1 physiotherapist), in 8 different pulmonology and paediatric wards. A total of 42.5% reported previous training in inhalation device technique. When evaluating theoretical knowledge, we found a mean of 54% correct answers. Attending physicians did significantly better than residents and nurses. With regard to practical skills, we found a mean of 1.12 failed steps out of 7. Here again attending physicians did significantly better than residents and nurses.

CONCLUSION

Based on the results of our study, we recommend that attending physicians provide training of inhalation technique to nurses and residents, as they did significantly better theoretically and practically.

[Application of a hospital audit to the use of nebulizers: the Case of the Hôtel-Dieu de France-Lebanon]

PROBLEM

The aim of the study was to reduce the unjustified prescriptions of nebulised therapy, in order to comply with the international guidelines and to reduce healthcare costs.

METHODS

DESIGN

We performed a controlled, prospective study to evaluate the impact of local guidelines aimed at improving doctors' behaviour on appropriateness and costs of implementation.

BACKGROUND AND SETTING

All the departments of a university hospital: medical and surgical wards, intensive care units, emergency rooms and one-day admission units. KEY MEASURE FOR CHANGE: Reduction in the number of inappropriate prescriptions of nebulised therapy.

STRATEGIES FOR CHANGE

Implementation included two educational presentations, posters displayed in all departments, emails sent to all doctors and residents, and reassessment of the prescription one week after.

RESULTS

Prior to the intervention, the rate of inappropriate prescriptions was 11.9% (42/358 of patients treated with nebulizers did not have an indication for this treatment and 3/19 of patients had an indication for nebulisation but were not treated); in the postintervention, the rate of inappropriate prescriptions was 14.6% (15.7% of patients without indication for treatment, but no patient with an indication for treatment untreated), reflecting a lack of significant impact of the intervention.

CONCLUSIONS

Simple presentation of clinical guidelines did not lead to a change in medical practices. Another approach is needed to improve this outcome effectively.

[Nebulized corticosteroids and pediatricians: results of the NUAGES survey]

INTRODUCTION

The aim of the study was to analyze the data of the NUAGES survey (a survey on the practice of nebulization in France), concerning the prescriptions of nebulized steroids from 514 pediatricians.

MATERIAL AND METHODS

The reason why nebulization was chosen as a delivery route, the diseases motivating the prescription, the age of the patients, the kind of drug used, and the prescription and device modalities were studied.

RESULTS

Efficacy in treating various respiratory diseases was the main reason cited for using nebulization, in particular severe persistent asthma (76%). Pediatricians prescribed nebulization mainly to infants (60%). The most frequently used drug was budesonide suspension (89%), but the intravenous route for steroids (18%) and drug admixtures (62%) were also proposed by nebulization. A specific prescription for the nebulizer was given in 75% of the cases, with the type of interface to use specified in 66%.

DISCUSSION

Pediatricians consider that nebulization is well adapted to young children. Although the proper steroid is usually chosen, unfortunately, it is often prescribed with other drugs, with 1 prescription out of 4 not following the recommendations. Prescription of the device is not optimal and may compromise the efficacy of the treatment.

CONCLUSION

Nebulization is a potential mode of delivery for steroids that is difficult to prescribe and warrants improved pediatrician training.