Dunn develops and supplies tubing for a wide range of minimally invasive devices. These extruded tubes range from soft and flexible polyurethanes used in vascular catheters to rigid polycarbonates used in laparoscopy instruments. Dunn extrusions are vital components for devices used in arthroscopic, endoscopic, laparoscopic, endovascular, central venous and other minimally invasive devices.


Arthroscopy is used to diagnose and repair many joint problems including elbows, wrists, hips and ankles. These procedures are performed using lighted, tube-shaped instruments (arthroscopes) that are inserted into small incisions (portals), in the skin near the joint. The arthroscope contains optic fibers that transmit an image via a small camera to an operating room video monitor of the inside of the joint. These images allow the clinician to examine the joint and repair the damaged area by inserting minimally invasive surgical instruments through other portal incisions.


Endoscopy is used to diagnose and treat a variety of problems through natural orifices in the body. These include gastrointestinal, ear, nose and throat disorders. These procedures use flexible endoscopes, which contain fiber-optic light and a video camera at the tip. The camera transmits an image of the inside of the body to a video monitor for diagnosis. Surgical intervention is performed by inserting flexible instruments through working channels (lumens) in the endoscope.


Laparoscopy is a minimally invasive procedure used to diagnose and treat abdominal, obstetric, gynecologic, and urological disorders. Laparoscopic procedures are performed on a wide range of organs, such as the gallbladder, intestines, kidneys, liver, stomach, reproductive organs, appendix and more. A laparoscope is a small telescopic device that is inserted through a small incision in the abdomen and provides visibility to the area of concern. Minimally invasive instruments are inserted through other incisions in the abdomen for surgical intervention.


Endovascular surgery is performed within the blood vessels and is commonly used to treat blood-filled dilations (aneurysms), narrowing areas (stenosis) and blockages (occlusions). It is also used to deliver replacement heart valves, blood flow diversion stents and more. Long hollow tubes (catheters) are inserted into femoral or radial arteries and advanced to the desired vascular site using x-ray imaging. Balloons, grafts, stents and other devices are deployed through the catheter for surgical intervention.

Central Venous

Central venous (CV) catheterization is performed on patients that require regular or continuous injections of medications, nutritional support, blood sampling and blood product transfusions. These devices avoid the need for frequent injections or intravenous catheters placed in the arm. Also, many medications and nutritional fluids can be damaging to smaller peripheral veins. CV catheters can be inserted through a vein in the neck (external or internal jugular vein), the upper chest under the collar bone (subclavian vein), or the arm (peripherally). These are then advanced into a large central vein in the chest (superior vena cava). CV catheters can be permanently placed under the skin with no catheter protruding through the skin (internal catheter), or those that come out through the skin (external catheter).

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