[CHARACTERISTICS OF BUDEFORU® FOR BUDESONIDE AND FORMOTEROL MIXTURE].
Arerugi
; 71(1): 37-41, 2022.
Article
en Ja
| MEDLINE
| ID: mdl-35173123
ABSTRACT
BACKGROUND:
Recently, BudeForu® (BF), a generic of Symbicort Turbuhaler® (SMB), is widely used in Japan. Although appearance of BF resembles to SMB, several differences in length, weight, and side-hole sizes are seen with precise inspection. As particle releases from the inhalation device is strongly influenced by its mechanical characteristics, we compared their particle release patterns.METHODS:
An inhalation simulator generated either ramp-up or triangular (time to reach peak inhaling flow (PIF) = 0.42 s) inhalation pattern. Time trajectories of inhaled flow and released particles from either device were depicted with a photo-reflection method. Internal resistances of them were also measured.RESULTS:
Particle release patterns of both dry powder inhalers resembled each other. Immediately after release from the inhaler, they reached the peak value and then completed in 0.5 s. In either ramp-up or triangular inspiration pattern, a single burst developed at early inhalation. There were linear relationships between PIFs and emitted doses. The regression lines using ramp-up patters were Y = 0.00241 X - 0.039, r2 = 0.700, p ï¼ 0.0001 (BF), Y = 0.00210 X - 0.038, r2 = 0.654, p ï¼ 0.0001 (SMB), and those using triangular patterns were Y = 0.00223X ï¼ 0.0015, r2 = 0.445, p ï¼ 0.0001 (BF), and Y = 0.00229X ï¼ 0.0023, r2 = 0.687, p ï¼ 0.0001 (SMB). Internal resistances of the BF and SMB were 0.105±0.004 and 0.119±0.105 cmH2O0.5/L/min respectively.CONCLUSIONS:
Present experimental study suggested that aerodynamic characteristics of BF were quite similar to those of SMB.Palabras clave
Texto completo:
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Bases de datos:
MEDLINE
Asunto principal:
Budesonida
/
Combinación Budesonida y Fumarato de Formoterol
Límite:
Humans
Idioma:
Ja
Revista:
Arerugi
Año:
2022
Tipo del documento:
Article