Photoactivation light array

• US 5,569,928 A
• Filed: 12/14/1993
• Issued: 10/29/1996
• Est. Priority Date: 12/14/1993
• Status: Expired due to Term

• Current Assignee: Therakos, Inc (Mallinckrodt plc)
• Original Assignee: Therakos, Inc (Mallinckrodt plc)
• Inventors: Palmer, deceased, David W., Lee, Kyu H., Morris, Livingston B.
• Primary Examiner(s): Berman, Jack I.
• Application Number:
  US08/166,494
• Time in Patent Office: 1,050 Days
• Field of Search: 250/494.1, 250/455.1, 250/504 R, 313/1, 313/493, 362/216
• US Class Current: 250/494.1
• CPC Class Codes: A61M 1/3681 by irradiation
• CPC Class Codes: A61M 1/3683 using photoactive agents
• CPC Class Codes: A61M 1/3693 using separation based on different densities of components, e.g. centrifuging
• CPC Class Codes: A61M 2205/051 with radiation therapy

Abstract

Light arrays for use in systems for separating and irradiating blood are disclosed. In accordance with the present invention, the light array has one or more bulbs with electrical connecting leads and first and second support members connected to the bulbs. The second support member preferably includes a connector for receiving the electrical leads. The support members preferably define an end surface and an interior surface, wherein the support members are disposed adjacent the bulbs so the end surfaces are opposed to define a channel, providing a space where tubing carrying blood or other fluids can be disposed without interfering with the array. The bulbs are most preferably attached to the support members using flexible self-locking straps, and in embodiments using two or more bulbs, the bulbs are also preferably held together by one or more straps. Improved mounting systems for connecting the array to the instrument by one or more spring mounts are also disclosed. In certain preferred embodiments, one of the support members is a circuit board and includes a microcircuit for controlling the operation of the array using a clock/timer circuit for determining a total time of activation for the array, whereby upon reaching a predetermined value of the total time of activation, the clock/timer circuit disables the light array. Thus, methods of controlling the output of an array of bulbs are also disclosed.

Claims

1. A system for separating and irradiating blood comprising:

an instrument including a rotatable separation and irradiation chamber; and

light array providing a source of radiant energy connected to the instrument and disposed within the separation and irradiation chamber, the light array comprising;

one or more bulbs each having a first end and a second end, and each comprising electrical connecting leads;

a first support member connected to the bulbs;

a second support member disposed between the first end and the second end, and connected to the bulbs, the support member further comprising a connector for receiving the electrical leads;

the support means define an end surface and an interior surface, wherein the support members are disposed adjacent the bulbs so the end surfaces are opposed to define a channel therebetween.

2. The system of claim 1, wherein the bulbs are attached to the support members using flexible self-locking straps.

3. The system of claim 1 comprising three bulbs.

4. The system of claim 1 comprising more than one bulb where the bulbs are held together by one or more straps.

5. The system of claim 1 wherein the second support member further comprises a circuit board and a microcircuit.

6. The system of claim 5 wherein the microcircuit comprises a clock/timer circuit for determining a total time of activation for the array, whereby upon reaching a predetermined bulb life value of the total time of activation, the clock/timer circuit disables the light array.

7. The system of claim 1 wherein the array is connected to the instrument by one or more spring mounts.

8. The system of claim 7 wherein the array is connected to the instrument by three centrally disposed and equally spaced spring mounts.

9. The system of claim 7 wherein the spring mounts comprise leaf springs.

10. A light array comprised of one or more tubular, circular bulbs each having a first end and a second end, and having one or more electrical leads attached to a support member disposed between the first and second ends, the support member comprising a connector for receiving the electrical leads, wherein the support member defines a channel.

11. The light array of claim 10 wherein the bulbs are attached to the support member with self-locking flexible straps.

12. The light array of claim 10 further comprising a second support member, the first and second support members each defining an end surface and an interior surface, wherein the support members are disposed adjacent the bulbs so the end surfaces are opposed to define a channel therebetween.

13. The light array of claim 10 wherein the support member further comprises a circuit board and a microcircuit.

14. The light array of claim 10 wherein the microcircuit comprises a clock/timer circuit for determining a total time of activation for the array, whereby upon reaching a predetermined bulb life value of the total time of activation, the clock/timer circuit disables the light array.

15. The light array of claim 10 comprising three bulbs.

16. The light array of claim 10 wherein the bulbs emit ultraviolet radiation.

17. A method of controlling the output of an array of bulbs comprising the steps of:

monitoring the total time the bulbs are activated;

comparing the total time to a predetermined bulb life time value;

determining if the total time exceeds the predetermined bulb life time value;

disconnecting the array from a power source when the total time exceeds the predetermined bulb life time value; and

replacing the array of bulbs.