Penetrable and resealable lyophilization method

• US 8,171,652 B2
• Filed: 06/27/2011
• Issued: 05/08/2012
• Est. Priority Date: 04/24/2006
• Status: Expired due to Fees

• Current Assignee: Medical Instill Technologies Inc.
• Original Assignee: Medical Instill Technologies Inc.
• Inventors: Py, Daniel
• Primary Examiner(s): Gravini, Stephen M.
• Application Number:
  US13/169,586
• Publication Number:
  US 20110253250A1
• Time in Patent Office: 316 Days
• Field of Search: 342/87, 345/59, 34/4, 34/13, 344/17, 345/24, 34/92, 34/90, 34/24, 34/2, 141/7, 141/301, 604/30
• US Class Current: 34/287
• CPC Class Codes: F26B 5/06 the process involving freezing

Abstract

Device and method for lyophilizing a substance within the device and storing therein the lyophilized substance. The device defines a chamber for receiving therein the substance to be lyophilized, a penetrable and resealable portion of the device is penetrable or pierceable by a needle for filling the device with the substance, and a resulting hole therein is resealable by transmitting radiation from a radiation source thereon. A filter is connectable in fluid communication between an interior and exterior of the chamber for permitting fluid to flow therethrough in a direction from the interior to the exterior of the chamber, and for substantially preventing contaminants from flowing therethrough in a direction from the exterior to the interior of the chamber.

Claims

1. A method of filling a device with a substance to be lyophilized, lyophilizing the substance within the device, and storing the lyophilized substance within the device, the method comprising the following steps:

filling a device including a body defining a chamber enclosed by a liquid-impermeable closure in sealing engagement therewith and a penetrable and resealable portion in fluid communication with the chamber, the filling step comprising;

penetrating the penetrable and resealable portion with a tip of an injection or filling member such that a flow aperture of the injection or filling member is in fluid communication with the chamber of the device;

introducing the substance to be lyophilized through the injection or filling member and into the chamber of the device; and

withdrawing the injection or filling member from the penetrable and resealable portion;

lyophilizing the substance within the chamber with the closure in engagement with the body, causing fluid to flow out of the chamber during lyophilization, and preventing at least one of contaminants and moisture from flowing into the chamber during lyophilization; and

hermetically sealing an aperture formed by the injection or filling member in the penetrated region of the penetrable and resealable portion.

2. A method as defined in claim 1, wherein the device includes a filter in fluid communication between the interior and exterior of the chamber;

and the lyophilizing step includes lyophilizing the substance within the chamber, causing fluid to flow through the filter and out of the chamber during lyophilization, and preventing the at least of contaminants and moisture from flowing through the filter and into the chamber during lyophilization.

3. A method as defined in claim 1, wherein the step of hermetically sealing the aperture occurs prior to the step of lyophilizing.

4. A method as defined in claim 1, wherein the lyophilization step includes freezing the substance within the chamber;

subjecting the device to vacuum and removing ice from the chamber by sublimation; and

then increasing the temperature within the chamber and desorbing residual moisture from the substance within the chamber.

5. A method as defined in claim 2, further comprising the step of sealing the filter and chamber with respect to the ambient atmosphere after the step of lyophilizing the substance within the chamber.

6. A method as defined in claim 1, further comprising the step of sterilizing the chamber.

7. A method as defined in claim 6, wherein the sterilizing step is performed prior to introducing the substance to be lyophilized through the injection or filling member and into the chamber.

8. A method as defined in claim 6, wherein the sterilizing step is selected from the group including (i) applying gamma radiation, (ii) applying e-beam radiation, and (iii) applying laser radiation, to the chamber.

9. A method as defined in claim 1, further comprising the step of configuring at least one of the penetrable and resealable portion and the injection or filling member to substantially prevent the formation of particles released into the chamber during injection or filling member penetration and withdrawal.

10. A method as defined in claim 1, wherein during lyophilization, fluid flows out of the chamber through the closure.

11. A method as defined in claim 1, wherein the injection or filling member is defined by a needle.

25. A method as defined in claim 1, wherein the hermetically sealing step comprises applying energy or radiation from a source thereof to a penetrated region of the penetrable and resealable portion.

26. A method as defined in claim 1 including overlaying a covering portion over the penetrable and resealable portion, thereby at least one of forming a fluid-tight seal between the penetrable and resealable portion and the ambient atmosphere, and forming a barrier to the transmission of moisture and vapor therethrough.

27. A method as defined in claim 1, wherein the penetrable and resealable portion includes an underlying portion formed of a material compatible with the substance and defining a substance-exposed surface exposed to the substance within the device, and a resealing portion overlying the underlying portion.

28. A method as defined in claim 27, wherein the underlying portion is substantially infusible in response to an application of the radiation or energy to the penetrable and resealable portion, and the resealing portion is fusible in response to the application of radiation or energy.

29. A method as defined in claim 28, wherein the hermetically sealing step includes applying radiation or energy to the resealing portion.

12. A method comprising the following steps:

filling a sealed empty sterile device including a body defining a chamber, and a penetrable and resealable portion forming a liquid-tight seal between the chamber and ambient atmosphere, the filling step comprising penetrating the penetrable and resealable portion with an injection or filling member and sterile filling a liquid substance to be lyophilized into the sealed, empty, sterile chamber through the penetrable and resealable portion;

providing at least one aperture through the penetrable and resealable portion to permit fluid to flow out of the chamber;

lyophilizing the substance within the chamber; and

closing the at least one aperture and hermetically sealing the lyophilized substance within the chamber.

13. A method as defined in claim 12, wherein the closing step occurs after the lyophilizing step.

14. A method as defined in claim 12, further comprising the step of sterilizing the sealed empty device.

15. A method as defined in claim 14, wherein the sterilizing step includes at least one of i) irradiating the sealed empty device and ii) subjecting the device to at least one of gamma, e-beam and laser radiation.

16. A method as defined in claim 12, wherein the penetrable and resealable portion is defined by a stopper.

17. A method as defined in claim 12, wherein the injection or filling member is defined by a needle.

18. A method as defined in claim 12, wherein the penetrable and resealable portion is resealable by applying energy or radiation from a source thereof to a penetrated region of the penetrable and resealable portion.

19. A method as defined in claim 18, wherein the penetrable and resealable portion is resealable by at least one of (i) applying laser radiation and (ii) applying thermal energy.

20. A method as defined in claim 12, wherein the penetrable and resealable portion includes an underlying portion formed of a material compatible with the substance and defining a substance-exposed surface exposed to the substance within the device, and a resealing portion overlying the underlying portion.

21. A method as defined in claim 20, wherein the underlying portion is substantially infusible in response to an application of the radiation or energy to the penetrable and resealable portion, and the resealing portion is fusible in response to the application of radiation or energy.

22. A method as defined in claim 21, further comprising applying radiation or energy to the resealing portion.

23. A method as defined in claim 12 including overlaying a covering portion over the penetrable and resealable portion, thereby at least one of forming a fluid-tight seal between the penetrable and resealable portion and the ambient atmosphere, and forming a barrier to the transmission of moisture and vapor therethrough.

24. A method as defined in claim 12, further comprising the step of preventing at least one of contaminants and moisture from flowing into the chamber during lyophilization.