The sputum expectorator helps patients remove respiratory secretions by attracting sputum through negative pressure, which can reduce the risk of respiratory obstruction and infection. However, sputum expectorators are not the fundamental treatment for the condition; they only provide an aid to help patients remove respiratory secretions. The key to treatment is still to treat the cause of the disease.
So, it can be said that hospital sputum expectorator can help patients to expel phlegm, but the specific effect still needs to be determined according to the patient's condition and the doctor's guidance. It is worth noting that the use of sputum expectorator needs to strictly follow the doctor's advice and operating instructions to avoid causing other problems. If you have questions about the specifics, it is recommended that you consult with a healthcare professional.