Local disinfection for drug delivery system
Apparatus and a method are presented, including disinfecting a disinfection chamber that is defined between (i) a prefilled therapeutic substance reservoir and (ii) a sterile fluid path disposed within a therapeutic substance delivery device. The sterile fluid path includes a needle at an upstream end of the sterile fluid path and an injection assembly at a downstream end of the sterile fluid path. The disinfection occurs subsequently to the prefilled therapeutic substance reservoir being engaged with the therapeutic substance delivery device. Subsequently to disinfecting the disinfection chamber, the disinfection chamber and then the reservoir are penetrated with the needle. Other applications are also described.
1. A method comprising:
using a disinfection assembly disposed within a therapeutic substance delivery device, disinfecting a disinfection chamber that is defined between (i) a prefilled therapeutic substance reservoir and (ii) a sterile fluid path disposed within the therapeutic substance delivery device,
the sterile fluid path comprising a needle at an upstream end of the sterile fluid path and an injection assembly at a downstream end of the sterile fluid path; and
penetrating the disinfection chamber and then the reservoir with the needle,
the disinfecting occurring (a) subsequently to the prefilled therapeutic substance reservoir being engaged with the therapeutic substance delivery device and (b) prior to the penetrating of the disinfection chamber and then the reservoir with the needle.
2. The method according to claim 1 , wherein the step of disinfecting the disinfection chamber is performed following a user of the therapeutic substance delivery device engaging the prefilled therapeutic substance reservoir with the therapeutic substance delivery device, wherein the disinfection chamber is defined when the prefilled therapeutic substance reservoir becomes engaged with the therapeutic substance delivery device.
3. The method according to claim 1 , wherein the step of disinfecting the disinfection chamber is performed following a user of the therapeutic substance delivery device removing the therapeutic substance delivery device from commercial packaging, wherein the prefilled therapeutic substance reservoir and the therapeutic substance delivery device are engaged with one another inside the commercial packaging.
4. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises activating the disinfection assembly and subsequently terminating the activation of the disinfection assembly, and wherein penetrating the disinfection chamber comprises penetrating the disinfection chamber within 10 seconds after terminating the activation of the disinfection assembly.
5. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises activating the disinfection assembly and terminating activation of the disinfection assembly within 5 minutes after activating the disinfection assembly.
6. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises irradiating the disinfection chamber with ultraviolet radiation.
7. The method according to claim 6 , wherein irradiating the disinfection chamber comprises irradiating the disinfection chamber with ultraviolet radiation at a power level of 1-200 mW.
8. The method according to claim 6 , wherein irradiating the disinfection chamber comprises irradiating the disinfection chamber with ultraviolet radiation at a wavelength of 100-400 nm.
9. The method according to claim 6 , wherein irradiating the disinfection chamber comprises irradiating the disinfection chamber with ultraviolet light using an ultraviolet light emitting diode.
10. The method according to claim 6 , further comprising:
subsequently to irradiating the disinfection chamber with the ultraviolet light, measuring a value indicative of intensity of the ultraviolet radiation within the disinfection chamber; and
terminating the irradiation of the disinfection chamber at a time determined based on the measured value.
11. The method according to claim 10 , wherein measuring the value indicative of intensity of the ultraviolet radiation comprises measuring the intensity of the ultraviolet radiation within the disinfection chamber using an ultraviolet sensor disposed within the disinfection chamber.
12. The method according to claim 10 , wherein (a) irradiating the disinfection chamber with ultraviolet radiation comprises activating an ultraviolet light emitting diode (UV LED) and (b) measuring the value indicative of intensity of the ultraviolet radiation comprises measuring a current input to the UV LED.
13. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises heating the disinfection chamber.
14. The method according to claim 13 , wherein heating the disinfection chamber comprises heating the disinfection chamber to a temperature of 40-300 degrees Celsius.
15. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises releasing a disinfectant fluid into the disinfection chamber.
16. The method according to claim 1 , wherein disinfecting the disinfection chamber comprises disinfecting the disinfection chamber within 5 minutes prior to penetrating the disinfection chamber and subsequently the reservoir with the needle.
17. The method according to claim 16 , wherein disinfecting the disinfection chamber comprises disinfecting the disinfection chamber at least 1 month following engagement of the prefilled therapeutic substance reservoir with the therapeutic substance delivery device.
18. The method according to claim 17 , wherein disinfecting the disinfection chamber comprises disinfecting the disinfection chamber at least 6 months following engagement of the prefilled therapeutic substance reservoir with the therapeutic substance delivery device.
19. The method according to claim 16 , wherein the disinfecting of the disinfection chamber is at least a second disinfecting of the disinfection chamber, a first disinfecting of the disinfection chamber occurring prior to the therapeutic substance delivery device being packaged for commercial sale.
20. The method according to claim 19 , further comprising disinfecting the disinfection chamber at least one time between the first disinfecting of the disinfection chamber and the at least a second disinfecting of the disinfection chamber.