Methods and apparatus to inactivate infectious agents on a drainage catheter residing in a body cavity
Methods and apparatus for the inactivation of infectious agents in, on or around a catheter residing in a patient's body cavity. The method comprises a coupling adapter for facilitating the transmission of non-ultraviolet sterilizing electromagnetic radiation (EMR) substantially axially along an optical element into the catheter body. Through delivery of the sterilizing EMR to particular areas of highest infection, the present disclosure is able to inactivate the major sources of infection in catheters.
1. A medical device assembly for insertion into a cavity of a patient's body and for drainage of a fluid from the patient's body, comprising:
an electromagnetic radiation (EMR) source selected from a group including a solid state laser, a semiconductor laser, a diode laser, and a light emitting diode, the EMR source for providing non-ultraviolet, sterilizing EMR having a wavelength in a range of above 380 nm to 900 nm and having an intensity comprising a radiant exposure of at least 0.1 J/cm 2 and up to 100 J/cm 2 and power of at least 0.005 mW and up through 1 Watt, such intensity being sufficient to inactivate one or more infectious agents, the catheter body being configured to facilitate at least one of delivery of fluid into the patient's body and drainage of fluid from the patient's body;
a catheter having an elongate catheter body with at least one internal lumen, a coupling end and an distal end tip, the distal end tip being insertable into the cavity of the patient's body, wherein the catheter body directs both the fluid and the sterilizing EMR axially through the catheter body for delivery into the patient's body at the distal end tip;
an optical element disposed within the catheter body and conducive to the axial propagation of the sterilizing EMR through the catheter body;
an inflatable balloon disposed to surround the catheter proximate the distal end tip for securing the catheter in a desired location, the inflatable balloon being inflated by delivery of inflation fluid to the balloon; and
at least one coupling to connect the radiation source to the catheter body.
2. The medical device assembly as in claim 1 wherein the wavelength of the sterilizing EMR is selected from a group of wavelengths including wavelengths centered about 400 nm, 405 nm, 415 nm, 430 nm, 440 nm, 455 m, 470 nm, 475 nm, 660 nm, and 808 nm.
3. The medical device assembly as in claim 1 wherein the optical element is selected from a group of optical elements including a reflective surface, a lens, a fiber optic element, and any combination thereof.
4. The medical device assembly as in claim 1 wherein the catheter is an indwelling urinary catheter.