# US 11,992,695 B2 · Apparatus for tissue irradiation and methods and kits utilizing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,992,695 B2 - Document ID: US11992695B2 - Status: Granted - Kind: B2 - Application number: 16/781,415 - Filed: 2020-02-04 - Published: 2021-01-07 - Granted: 2024-05-28 - Earliest claimed: 2013-03-15 - Assignees: The General Hospital Corporation - Applicants: The General Hospital Corporation - Inventors: Michael C. McCormack; Robert Redmond; William G. Austen, Jr.; Irene E. Kochevar - Web page: https://patentgrep.com/patent/US11992695B2 ## CPC - A61N 5/0601: {Apparatus for use inside the body} - A61B 2018/2261: {with scattering, diffusion or dispersion of light} - A61N 5/0603: {for treatment of body cavities} - A61N 5/062: {Photodynamic therapy, i.e. excitation of an agent} - A61N 2005/007: {for cooling the patient} - A61N 2005/0656: {Chemical light sources} - A61N 2005/0667: {Filters} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract One aspect of the invention provides an apparatus including: a fluid-impermeable membrane configured to contain a fluid and be placed in the cavity; a light emitter provided within the membrane; and a fluid provided within the membrane, wherein the fluid scatters light emitted by the light emitter such that the intensity of the light is substantially uniform over the inner surface of the cavity proximal to the membrane. ## Claims ### Claim 1 An apparatus for irradiating the inner surface of a biological cavity, comprising: a fluid-impermeable membrane configured to contain a fluid and be placed in the cavity; a light emitter extending into the fluid-impermeable membrane from a support that is proximal and external to the fluid-impermeable membrane; a fluid provided within the fluid-impermeable membrane from the support, wherein the fluid scatters light emitted by the light emitter such that the intensity of the light is substantially uniform over the inner surface of the cavity proximal to the fluid-impermeable membrane; and a spacing arrangement provided proximal to the light emitter such that the spacing arrangement does not extend distally past the light emitter and within the fluid-impermeable membrane, wherein the spacing arrangement is configured to maintain a minimum distance between the light emitter and an inside wall of the fluid-impermeable membrane. ### Claim 2 (depends on 1) The apparatus of claim 1, further comprising an access port coupled to the interior volume of the fluid-impermeable membrane, wherein the access port is configured to facilitate at least one of introduction of the fluid into the fluid-impermeable membrane or removal of the fluid from the membrane. ### Claim 3 (depends on 1) The apparatus of claim 1, further comprising a valve coupled to an access port. ### Claim 4 (depends on 1) The apparatus of claim 1, further comprising a pressure relief arrangement. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the fluid-impermeable membrane is formed of an elastic material. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the fluid is at least one of a solution, a suspension, or an emulsion. ### Claim 7 (depends on 1) The apparatus of claim 1, further comprising a diaphragm coupled to the interior volume of the fluid-impermeable membrane, wherein the diaphragm is configured to facilitate introduction of the light emitter into the interior volume of the fluid-impermeable membrane. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the light emitter comprises at least one of an LED or a distal region of an optical fiber. ### Claim 9 (depends on 1) The apparatus of claim 1, further comprising at least one of a photoactive substance or a precursor to a photoactive substance that is provided on an outer surface of the fluid-impermeable membrane. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the photoactive substance or precursor is provided in a form that can be controllably released onto the inner surface of the cavity when the fluid-impermeable membrane is placed in the cavity. ### Claim 11 (depends on 1) The apparatus of claim 1, further comprising a cooling chamber. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the light emitter comprises one or more substances capable of at least one of undergoing or activating a chemiluminescent reaction within at least a portion of the fluid. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the light emitter comprises one or more substances capable of at least one of undergoing or activating a chemiluminescent reaction on at least a portion of the fluid-impermeable membrane. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the spacing arrangement is formed of a material that can scatter or diffuse light. ### Claim 15 An apparatus for irradiating the inner surface of a biological cavity, comprising: a fluid-impermeable membrane configured to contain a fluid and be placed in the cavity; a light emitter extending into the fluid-impermeable membrane from a support that is proximal and external to the fluid-impermeable membrane; a fluid provided within the fluid-impermeable membrane from the support, wherein the fluid scatters light emitted by the light emitter such that the intensity of the light is substantially uniform over the inner surface of the cavity proximal to the fluid-impermeable membrane; and a spacing arrangement provided proximal to the light emitter and within the fluid-impermeable membrane, wherein the spacing arrangement is spaced away from the light emitter so as to maintain a minimum distance between the light emitter and an inside wall of the fluid-impermeable membrane.