Telescopic spacer structure for drug administration of respiratory tract

Abstract

The invention discloses a telescopic spacer structure for drug administration of the respiratory tract and belongs to the technical field of medical instruments. The telescopic spacer structure comprises an outer cannula, an inner cannula, an inner cannula matching socket, a transitional connection cover, a guiding pipe, a drug administration mask, an administration valve and an drug agent pot cover; the inner cannula is arranged in the outer cannula, and a sealing ring is arranged on the outer wall of the inner cannula; the inner cannula matching socket is connected with the inner cannula in a matched manner with the center position forming a drug agent pot cover accommodating cavity; the transitional connection cover is connected to the upper end of the outer cannula in a matched manner with the upper portion forming a guide pipe matching socket, the wall body forming guide pipe matching socket outlets and the center position forming an atomizing nozzle; the guiding pipe is connected with the transitional connection cover, and exhalation valve ports are formed in the guiding pipe; the drug administration mask is provided with a mask interface, and a mask interface cavity is communicated with a guiding pipe cavity; the drug administration vale is arranged on the guide pipe matching socket, and exhalation valve slices are formed on the drug administration valve; the drug agent pot cover is matched with insertion of a drug agent pot cover cavity. By the arrangement, requirements on continuous administration are met, and convenience and rapidness in use are achieved; waste of drug agents cannot be caused by errors in operation; the telescopic spacer structure is simple in manufacturing and assembling, convenient to operate, suitable for drug administration changes for patients of different ages and physical abilities and no-picky in mode of drug administration.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a retractable spray spacer structure for drug administration in the respiratory tract. Background technique [0002] The English name of the spacer mentioned above is Spacer, which is an auxiliary tool for metered dose aerosol (MDI) inhalation therapy and is used to store medicament aerosol. The medicine mist sprayed by MDI is stored in the spacer tank, and the patient inhales the medicine from the spacer tank, which can improve the curative effect of MDI and reduce side effects. A typical example of respiratory tract administration mentioned above is the commonly used asthma metered aerosol administration for asthmatic patients, because when asthmatic patients seek medical treatment, doctors will prescribe metered-dose aerosol (MDI) for dilating airways. Once a patient suddenly suffers from an asthma attack in daily life and work, he or she can self-adminis...

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Problems solved by technology

[0005] The above-mentioned document C comprehensively gives the overall structure of the drug tank (the patent is called a spray tank) and the drug delivery device. The positive significance of this document C is that it can clearly display the remaining number of medications and avoid the trouble of being surprised when the drug is insufficient. , can refer specifically to paragraph 0007 to paragraph 0012 of the description of this patent, but there is following shortcoming in this patent scheme: First, since the mouth needs to leave the spray counter once every time you inhale, that is to say, the patient needs to take the spray counter once when the patient exhales. The mouth (also called the mouth) leaves the nozzle of the spray counter, and the mouth is matched with the nozzle of the spray counter when inhaling, so it is inconvenient to use, because in a drug delivery process, it is usually necessary to inhale the medicine multiple times, so there are many The nozzle of the spray counter is left for the first time, and this alternate action process causes trouble to the patient for continuous administration; secondly, because in the process of administration, when the patient's mouth leaves the nozzle of the spray counter, the MDI must be released at the same time. It will cause waste of medicine, because once the action is out of harmony (coordination), the waste of medicine is unavoidable; third, because the overall structure is complicated, it is not only difficult to manufacture, but also cheap; Satisfies the requirements of oral administration but cannot achieve nasal administration, so it is picky about the way of administration

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