Information
-
Patent Grant
-
6323501
-
Patent Number
6,323,501
-
Date Filed
Friday, March 12, 199925 years ago
-
Date Issued
Tuesday, November 27, 200123 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Anderson; Bruce
- Wells; Nikita
Agents
-
CPC
-
US Classifications
Field of Search
US
- 250 5071
- 250 5061
- 250 432 R
-
International Classifications
-
Abstract
A container for storing and transporting device containing radioactive materials used for medical procedures is disclosed. Such devices may include a radioactive shielding material which contains a portion of the radioactivity emitted by the radioactive material. The container has an upper portion and a lower portion, and at least one of the portions includes a radiation shielding material, such as lead, steel or other appropriate shielding materials. Devices containing radioactive material are placed within the container. The container secures the devices against lateral movement within the container. The radiation shielding material of the lower portion of the container may cooperate with the radiation shielding material of the device to contain more of the emitted radiation than is contained by the device alone. The container and the holder may be sterilizable to allow such devices to be transported and sterilized for medical use.
Description
FIELD OF THE INVENTION
The present invention relates to containers for the storage and transportation of devices which contain radioactive material, preferably for shipping of radioactive seeds used for medical treatments.
BACKGROUND OF THE INVENTION
Radioactive materials may be used for treating various illnesses including tumors and nodules. For example, radioactive materials, such as iodine
125
palladium
103
, or the like, may be implanted into a patient to provide localized radiation treatment of tumors.
It will be appreciated that such radioactive materials must be stored and transported in containers which protect patients, medical personnel and others that must handle the radioactive material from unnecessary exposure to radiation. Additionally, the radioactive materials must be packaged to allow safe transport from the manufacturer to an end user. Further, such radioactive materials must be safely packaged for storage at a facility, such as a warehouse or a hospital.
Conventional containers for transporting devices containing radioactive material are generally made of lead or steel or some other radiation shielding material. These containers, however, may be large, awkward, and heavy. Shipping such containers may be difficult, thereby increasing costs for the radioactive material, and discouraging return, cleaning and/or reuse of the containers.
One such existing container is made from a large block of steel having a handle formed integrally therewith. Within the steel block are formed a number of cylindrical cavities each for receiving a magazine containing radioactive seeds. Such steel containers are inordinately heavy and cumbersome and do not provide complete shielding of the radiation which escapes from the magazine.
Additionally, it is often necessary to sterilize medical equipment before use. The large size and weight of existing containers for magazines of radioactive seeds make them awkward to clean and/or sterilize. Also, these containers are unwieldy for handling the small quantities of radioactive material used in individual surgical procedures.
These and other drawbacks for presently available containers exist.
SUMMARY OF THE INVENTION
An object of the present invention is to overcome these and other drawbacks in existing containers.
Another object of the present invention is to provide a convenient, relatively lightweight container for storage and transportation of radioactive materials.
Another object of the present invention is to provide a container for transporting and storing devices housing radioactive material, wherein the container and the device cooperate to provide radiation shielding.
Another object of the present invention is to provide a container for transporting and storing devices housing radioactive material, whereby the devices are secured within the container to resist movement during transport and use.
Another object of the present invention is to provide a container for transporting and storing devices housing radioactive material, wherein the container includes a separate device holder which may be sterilized within or apart from the radiation shielding container, thereby easing the process of sterilizing the devices for use.
Another object of the present invention is to provide a container for transporting and storing devices housing radioactive material, wherein the devices are sealed within the container of the invention in a sterilized condition, thereby enabling transportation of sterilized devices.
These and other objects of the invention are accomplished according to various embodiments of the invention. One embodiment of the invention provides a container for storage and transportation of one or more devices each containing a plurality of individual dosage units of radioactive material. The container of the invention includes a radiation shielding material. The container also includes structure for retaining the devices within the container for transport. The container of the present invention is designed such that the container of the invention acts to contain at least some of the radiation emitted by the stored radioactive material.
Other objects and advantages exist for the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
illustrates a top view of a container according to a first embodiment of the invention.
FIG. 2
illustrates a side view of the container shown in FIG.
1
.
FIG. 3
illustrates a top view of a tray useful in a container according to a second embodiment of the invention including a plurality of magazines stored therein.
FIG. 4
illustrates a side view of the tray shown in FIG.
3
.
FIG. 5
illustrates a side view of a container according to the second embodiment of the present invention for use in combination with the tray shown in
FIGS. 3-4
.
FIG. 6
illustrates a top view of a container according to a third embodiment of the present invention with the upper portion removed.
FIG. 7
illustrates a side view of the container depicted in
FIG. 6
with the upper portion in place.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The container of the present invention may be used for storage and transportation of one or more magazines housing radioactive materials. Nonetheless, the structures and characteristics of the invention are equally applicable to the storage and transport of other types of devices including radioactive material, such as preloaded needles as well.
Specific embodiments of the present invention, as will be illustrated further in
FIGS. 1-7
, provide a container for the storage and transportation of magazines containing radioactive material. Radioactive seeds, which are used in the treatment of tumors and other medical problems, are often housed in magazines which generally contain a plurality of such seeds. The magazines function to both contain the seeds and to ease their loading into the applicators used to introduce the seeds into the human body. Such magazines typically dispense one seed at a time in a predetermined manner and orientation which facilitates the loading of such seeds into their applicators for use. One such magazine is available from Mick Radio and is described in U.S. Pat. No. 5,860,909. Another is illustrated in
FIGS. 1-7
herein. The invention is generally applicable to a variety of such magazines, as well as other devices containing radioactive material.
FIGS. 1 and 2
illustrate a first embodiment of a container
2
according to the invention for storing and transporting one or more magazines containing radioactive materials. Container
2
includes a lower portion
4
and an upper portion
6
, which may be separated to allow access to the inside of container
2
. Lower portion
4
may include a conventional radiation shielding material, such as lead, steel or other appropriate materials. In a more preferred embodiment of the invention, both upper portion
6
and lower portion
4
of container
2
include a radiation shielding material. Upper portion
6
and lower portion
4
of container
2
may be joined together by a closure
10
. The closure may be a friction fit, a mechanical fastener, threads, a slip-fit, or other similar closing structures. The container may also be taped closed on the outside to provide additional security, and such tape may also contain a radiation shielding material.
A basket
7
, which serves as a holder for magazines
8
, may be located within lower portion
4
of container
2
. Basket
7
also functions to isolate magazines
8
from contact with the lower portion
4
of container
2
. Such isolation may be required depending on the materials used to fabricate lower portion
4
of container
2
. Basket
7
may optionally include a handle
12
to facilitate removal of basket
7
from container
2
. Magazines
8
may be placed in recesses
16
of basket
7
which are defined by sleeves
14
which function to surround and laterally support magazines
8
. A drain port
18
may be located in the bottom of each recess
16
of basket
7
to allow liquids to drain from recesses
16
in order to facilitate cleaning and sterilization of basket
7
including the inner surfaces of sleeves
14
. Recesses
16
may be customized to conform to the specific shape of the magazines
8
or to help properly align magazines
8
in recesses
16
during insertion, such as, for example by providing a narrower section of recesses
16
formed by shoulder
20
in sleeve
14
. Magazines
8
may optionally be secured in recesses
16
by threads
13
on magazines
8
which mate with threads
17
in recesses
16
. Sleeves
14
are preferably connected to one another by ribs
22
which, optionally, may all connect at a handle
12
if such is included as part of basket
7
. Secondary ribs
23
may also be provided to enhance the mechanical integrity of basket
7
.
In a preferred embodiment of the invention, basket
7
is made of a sterilizable material. Basket
7
may be removed from container
2
, and be separately placed in a sterilization unit, such as an autoclave or chemical disinfection, chemical sterilization or other conventional means of sterilization, or may be sterilized while within lower portion
4
of container
2
. Thus, basket
7
may act as a simple transfer device for handling one or more magazines
8
prior to, and during use. Basket
7
may be injection molded from, for example, nucleated polypropylenes, polysulfones, polycarbonates, high temperature acrylics or polyether sulfones. Other conventional materials and/or methods of making basket
7
may also be employed. In another embodiment, container
2
may itself be sterilized, such as by an autoclave or other conventional means, thereby allowing sterilized magazines
8
to be sterilized directly in container
2
or stored or transported in container
2
in sterilized condition.
Referring still to
FIGS. 1-2
, upper portion
6
may also include a shoulder
24
which may be used to substantially secure magazines
8
against vertical movement in basket
7
, when upper portion
6
and lower portion
4
are associated to form container
2
. As described previously, magazine
8
may comprise a casing having an upper surface
11
. When a magazine
8
is placed into recess
16
of basket
7
, located in lower portion
4
and upper portion
6
is placed on lower portion
4
to enclose basket
7
, shoulder
24
is positioned closely adjacent to, or in abutment with, the upper surface
11
of each magazine
8
. Shoulder
24
thereby substantially secures magazine
8
in the vertical direction to minimize or prevent vertical movement of magazines
8
during transport.
Basket
7
of container
2
allows magazines
8
to be transported and sterilized easily, e.g., within a medical facility. Ease of transportation helps to minimize handling, thereby reducing the potential for exposure to radiation. A light-weight basket
7
also reduces the overall weight of container
2
, thereby reducing transportation costs and facilitating the handling of container
2
.
To use the container shown in
FIGS. 1-2
, one or more magazines
8
containing radioactive material are placed in recesses
16
of basket
7
. Basket
7
is located in lower portion
4
of container
2
. In this configuration, without upper portion
6
, the radiation shielding material included in lower portion
4
may cooperate with radiation shielding
9
of magazine
8
to together contain a substantial portion of radiation emitted by the radioactive material when the magazine
8
is the type which includes its own radiation shielding material. Thus, the potential for exposure to radiation, even with the container
2
in the open position, is minimized due to either the radiation shielding of the lower portion
4
of container
2
, or due to the cooperative shielding provided by the radiation shielding
9
of magazine
8
and the lower portion
4
of container
2
.
Magazines
8
may be fitted into recesses
16
of lower portion
4
by a friction fit, mechanical fastener, slip-fit or by a thread
17
, provided on the inner surface of the sleeve
14
and the cooperating thread
13
provided on the outer surface of magazine
8
. Subsequently, upper portion
6
is fitted onto lower portion
4
such that the closure
10
holds upper portion
6
in place on lower portion
4
. In this manner, shoulder
24
is positioned closely adjacent to, or in abutment with, upper surface
11
of magazine
8
to thereby minimize or prevent vertical movement of magazine
8
within recess
16
during storage and transport. Upper portion
6
may also optionally include a radiation shielding material to provide additional shielding against radiation emitted in the vertical direction.
FIG. 5
illustrates another embodiment of a container
102
of the present invention, and
FIGS. 3 and 4
illustrate a tray
108
to be used in the container
102
illustrated in FIG.
5
. Container
102
of
FIG. 5
comprises a lower portion
104
and an upper portion
106
. Lower portion
104
preferably includes a conventional radiation shielding material, such as lead, steel or other appropriate materials. In a more preferred embodiment of the invention, both upper portion
106
and lower portion
104
of container
102
include a radiation shielding material. Upper portion
106
and lower portion
104
may be joined by a closure
107
such as a friction fit, a mechanical fastener, a slip-fit, threads, or other similar closing structures. Tape may be provided on the outside of container
102
to ensure that the container
102
is not opened during transport.
Tray
108
is designed to be placed within container
102
. Tray
108
includes a plurality of recesses
112
for holding magazines
8
. Recesses
112
are preferably generally cylindrical in shape and more preferably are designed to provide a friction fit with at least a portion of a magazine
8
. Most preferably, recesses
112
are shaped to provide a form fit with magazines
8
. Recesses
112
hold magazines
8
by limiting their lateral movement within container
102
. Tray
108
may be vacuum-formed, molded, or injection molded, for example, and is preferably made from plastic or other suitable material. Tray
108
may be made from, for example, nucleated polypropylenes, polysulfones, polycarbonates, high temperature acrylics or polyether sulfones.
Tray
108
stabilizes magazines
8
during shipment and isolates magazines
8
from direct contact with container
102
. In a preferred embodiment of the invention, tray
108
is sterilizable. As such, tray
108
may be placed separately from container
102
in a sterilization unit, such as an autoclave or other conventional sterilization means, to facilitate handling and sterilization of the magazines
8
or may be sterilized together with container
102
.
In another embodiment of the invention, tray
108
may include a film
114
to hold magazines
8
in tray
108
against vertical movement. More preferably, film
114
seals tray
108
to permit shipment of sterilized magazines
8
. Alternatively, film
114
may include a radioactive shielding material and may optionally provide a seal for tray
108
as well. Film
114
may be any appropriate material, such as foil, a laminate, or the like. In another embodiment, the entire container
102
may be sterilized and sealed in any conventional manner, thereby allowing sterilized magazines
8
to be transported in tray
108
without requiring film
114
to seal the tray
108
.
Lower portion
104
of container
102
may optionally include a shelf
116
upon which a peripheral flange
109
of tray
108
may rest when tray
108
is placed within lower portion
104
of container
102
. Subsequently, when upper portion
106
of container
102
is put into place to close container
102
, peripheral flange
109
is pinched between shelf
116
of lower portion
104
and a mating surface
117
of upper portion
106
to thereby substantially secure tray
108
in place and prevent movement and shifting of tray
108
during transport of container
102
. Peripheral flange
109
may extend for only a portion of the periphery of tray
108
or around the entire periphery.
Tray
108
of container
102
allows a plurality of magazines
8
to be removed from container
102
and transported and sterilized more easily than if the magazines
8
remained in container
102
, e.g., within a medical facility. Additionally, the weight of the container
102
is reduced relative to the commercially available container, thereby reducing transportation costs and facilitating the handling of container
102
.
To use container
102
, magazines
8
are inserted into recesses
112
of tray
108
as shown in FIG.
3
. Tray
108
is positioned in lower portion
104
of container
102
as shown in FIG.
5
. Radiation shielding provided by lower portion
104
which may include a radiation shielding material may act in cooperation with radiation shielding material
9
of magazine
8
to contain a substantial portion of the radiation emitted by the radioactive material contained in magazine
8
. In this manner, the container shown in
FIGS. 3-5
minimizes the potential for exposure to radiation even when the container
102
is open.
For storage and/or transport, upper portion
106
of container
102
is placed atop lower portion
104
as shown in
FIG. 5
with closure
107
holding upper portion
106
in place on lower portion
104
. As can be seen in
FIG. 5
, upper portion
106
preferably pinches flange
109
of tray
108
atop shelf
116
of lower portion
104
in order to firmly secure tray
108
in position within container
102
. Upper portion
106
may optionally include a radiation shielding material to provide additional shielding against radiation emitted in the vertical direction.
FIGS. 6 and 7
illustrate another embodiment of a container
202
of the present invention. Container
202
comprises a lower portion
204
and an upper portion
206
. Lower portion
204
includes a conventional radiation shielding material, such as lead, steel or other appropriate materials. In a more preferred embodiment of the invention, upper portion
206
of container
202
also includes a radiation shielding material. Alternatively, upper portion
206
may be made of a material which does not act as a shield against radiation, such as a light-weight plastic, or other appropriate material. Upper portion
206
may be made from, for example, nucleated polypropylenes, polysulfones, polycarbonates, high temperature acrylics or polyether sulfones. Use of plastic in upper portion
206
further reduces the total weight of the container
202
, with a possible weight reduction 40-45%, versus use of lead. Reduced weight reduces costs for shipping and transporting container
202
and makes it easier to handle. Upper portion
206
and lower portion
204
may be joined by a closure
213
such as a friction fit, a mechanical fastener, threads, a slip-fit, or other similar closing structures and may be taped closed to ensure that the container
202
is not opened during transport.
Lower portion
204
includes recesses
210
to receive magazines
8
. Recesses
210
are preferably cylindrical in shape and more preferably recesses
210
provide a friction fit with at least a portion of a magazine
8
or form fit with the entire magazine
8
. In one embodiment of the invention, it may be desirable to isolate magazines
8
from lower portion
204
through use of a plastic sleeve (not shown) or other appropriate device such as those described in the other embodiments of the present invention. A plastic sleeve may be placed over magazines
8
, or may be placed in recesses
210
.
Upper portion
206
of container
202
includes a plurality of holders
212
formed by projections
214
, each holder
212
designed to receive an end of a magazine
8
. Upper portion
206
and lower portion
204
are manufactured so that holders
212
align with recesses
210
when the container
202
is closed, thereby allowing each magazine
8
to be secured against lateral movement by a combination of the action of holders
212
and recesses
210
. Moreover, projections
214
of upper portion
206
can be fabricated to be closely adjacent to, or in abutment with, upper surfaces
11
of magazine
8
when container
202
is closed to further secure magazines
8
against vertical movement in container
202
. Upper portion
206
may be placed on lower portion
204
, thereby enclosing magazines
8
within container
202
. More specifically, magazines
8
are preferably enclosed within holders
212
and recesses
210
to prevent lateral movement thereof as shown in FIG.
7
.
To use the container shown in
FIGS. 6-7
, magazines
8
are placed into recesses
210
of lower portion
204
of container
202
as shown in FIG.
7
. In this position, without upper portion
206
of container
202
, the radiation shielding material which may be contained in lower portion
204
may cooperate with the radiation shielding material
9
of magazines
8
to together contain a substantial portion of the radiation emitted by the radioactive material contained in magazines
8
. In this manner, the potential for exposure to radiation is minimized, even when container
202
is open.
For storage and shipment, upper portion
206
of container
202
is placed atop lower portion
204
shown in FIG.
7
and the closure
213
maintains upper portion
206
in position on lower portion
204
. Upper portion
206
provides vertical and additional lateral stability to magazines
8
by virtue of holders
214
which limit lateral movement of magazines
8
and which are closely adjacent to, or in abutment with, upper surface
11
of magazines
8
to thereby also limit vertical movement thereof. Upper portion
206
may optionally include a radiation shielding material to provide additional shielding against radiation emitted in the vertical direction.
According to an alternative embodiment of the present invention, lower portion
204
and upper portion
206
may be placed in a sterilization unit, such as an autoclave or other conventional sterilization means and subsequently sealed in any conventional manner. This allows container
202
to store and transport magazines
8
in a sterilized condition.
These and other embodiments and uses of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. For example, containers may be altered to accept magazines of various sizes and shapes. The specification and examples should be considered exemplary only. The scope of the invention is only limited by the claims appended hereto.
Claims
- 1. A container for housing at least one device which contains radioactive material therein, said device being selected from the group consisting of magazines containing a plurality of radioactive seeds and magazines containing one or more needles pre-loaded with implantable radioactive material, said container comprising:a first portion which includes a radiation shielding material; a second portion which, when associated with the first portion, encloses the at least one device; and a removable structure made from a sterilizable material which is specially adapted for securely retaining the at least one device in said first portion to resist movement of said at least one device in said first portion during transport and use whereby the radiation shielding material of said first portion contains at least some of the radiation emitted by the radioactive material in the at least one device.
- 2. A container as claimed in claim 1 wherein said structure for retaining the at least one device in said first portion comprises a sterilizable basket including at least one recess therein, each said recess being adapted for retaining at least one device therein.
- 3. A container as claimed in claim 1 wherein said structure for retaining the at least one device in the first portion includes at least one recess for receiving and retaining at least one device therein, and wherein said container further comprises a means for releasably securing the at least one device in the at least one recess.
- 4. A container as claimed in claim 3 wherein said means for releasably securing the at least one device in the at least one recess is selected from a friction fit or a form fit between said at least one recess and the at least one device, a mechanical fastener, and a thread provided in said at least one recess which mates with a thread provided on the at least one device.
- 5. A container as claimed in claim 1 wherein the second portion of the container includes a shoulder which, when the second portion is associated with the first portion to close the container, is positioned closely adjacent to, or in abutment with, an upper surface of the at least one device in order to limit vertical movement of the at least one device within the container.
- 6. A container as claimed in claim 1 wherein the second portion comprises a radiation shielding material.
- 7. A container as claimed in claim 1 wherein the structure for retaining the at least one device in the container is a tray provided with at least one recess therein which is adapted to receive and limit lateral movement of the at least one device in said container.
- 8. A container as claimed in claim 7 wherein the at least one recess in said tray is formed to provide either a friction fit with a portion of the at least one device or a form fit with the at least one device.
- 9. A container as claimed in claim 7 wherein said tray further comprises a flange which extends along at least a portion of a periphery of said tray, said first portion further comprises a shelf positioned such that said flange rests on said shelf when the tray is located within the first portion, and said second portion further comprises a mating surface which cooperates with said shelf to hold the flange and thereby secure the tray against vertical movement within the container.
- 10. A container as claimed in claim 1 wherein said second portion includes at least one holder adapted to receive and limit lateral movement of the at least one device and being positioned on said second portion to be in alignment with at least one recess in said first portion when said first and second portions are associated to close the container.
- 11. A container as claimed in claim 10 wherein the at least one holder extends to a location closely adjacent to, or in abutment with, an upper surface of the at least one device to thereby limit vertical movement of the at least one device when the first and second portions are associated to close the container.
- 12. A container as claimed in claim 1 wherein the device includes a radiation shielding material and the first portion of the container cooperates with the device to shield the radiation emitted by the radioactive material.
- 13. A container for housing at least one device which contains radioactive material therein, said container comprising:a first portion which includes a radiation shielding material; a second portion which includes a radiation shielding material; and a sterilizable holder having at least one recess for retaining the at least one device and limiting lateral movement of the at least one device, and a flange located on at least a portion of the periphery of said holder, and wherein said first and second portions of the container further comprise mating surfaces which cooperate with said flange to ensure that said holder is removeably retained within the container.
- 14. The container of claim 13, wherein at least a portion of each recess in said holder is formed to have a friction fit with a portion of each device to thereby limit lateral movement of the at least one device in said holder.
- 15. The container of claim 13, wherein each recess in said holder is form fitted to the form of each device to thereby limit lateral movement of the at least one device in said holder.
- 16. The container of claim 13, wherein the holder comprises a tray having at least one recess adapted to receive the at least one device, and wherein the holder further comprises a film to cover the at least one recess, thereby limiting vertical movement of the at least one device within the at least one recess of the tray.
- 17. The container of claim 16, wherein the holder comprises a basket having at least one recess for holding the at least one device; andwherein the second portion of the container further comprises a shoulder positioned such that the basket and the shoulder cooperate to limit both vertical and lateral movement of the at least one device within the container.
US Referenced Citations (15)
