Dr. Devries graduated from the Georgetown University School of Medicine in 1999. He works in Lebanon, NH and specializes in Cardiovascular Disease. Dr. Devries is affiliated with Dartmouth Hitchcock Medical Center.
James H. DeVries - Grand Rapids MI Steven R. Gundry - Redlands CA Brian S. Beals - East Grand Rapids MI
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61F 0202
US Classification:
600 37, 128897, 128898, 606201
Abstract:
A suction retractor that provides support to and positions an organ for surgery is provided. This retractor includes a support surface, a plurality of suction elements disposed adjacent the support surface, at least one leash operatively attached to the support surface; and at least one suction tube operatively connected with the suction elements. A method for using the retractor to manipulate an organ during surgery is also provided.
James H. DeVries - Grand Rapids MI John H. Dufek - Birmingham AL
Assignee:
DLP Inc. - Grand Rapids MI
International Classification:
A47L 2500
US Classification:
15104R
Abstract:
A surgical knife cleaner and, more particularly, a cleaner for a cautery knife used to clean and cauterize incisions and wounds. A readily attachable base has a cradle to retain a closely coiled strand on an axis parallel to the base. The cradle has edges to limit the introduction of the knife in the direction transverse to the axis of the coil and to clean the edge of the knife.
A two-staged venous cannula is disclosed having an angled bend near the distal end. In a preferred embodiment, the angle is a right angle. The angle bend allows the cannulation to take place near the junction of the inferior vena cava and the right atrium instead of higher in the right atrium. The cannula has a drainage hole at the apex of the angled bend to act as a blood collection port and a drainage hole at the distal end of the cannula to drain the inferior vena cava. The two-stage venous cannula is made of a rigid material at its distal end so that the distal end of the cannula may be easily inserted into the patient's heart through the right atrium. The disclosed cannula keeps the cannula away from the aorta, allows the cannula to exit the superior vena cava at an angle more perpendicular to the axis of the superior vena cave and allows the cannula to be used in minimally invasive surgical procedures where size and access restrictions often make it difficult to place and maintain such devices.
A removable stylet for use in the introduction of cannulae into a vessel or chamber of a body for medical procedures, and a retrograde coronary sinus perfusion cannula using such stylet. The stylet is used to guide the cannula during insertion, and includes a proximal relatively stiff end that can be manually manipulated by the attending physician to guide the stylet. On the distal end of the stylet is a relatively flexible portion that can be shaped into various curves and which is form-retaining while retaining flexibility.
Stuart J. Marcadis - Portage IN James H. DeVries - Grand Rapids MI
Assignee:
DLP, Inc. - Grand Rapids MI
International Classification:
A61M 2900
US Classification:
604 96
Abstract:
A perfusion catheter for use in open heart surgery having an inflatable cuff adjacent the distal end in communication with the lumen of the catheter to self-inflate when perfusion liquid is introduced into the lumen. A plug in the lumen within the cuff causes lumen flow to by-pass from the proximal end of the cuff to the distal end of the cuff through transverse parts in the lumen. A flow restriction at the distal end of the lumen causes pressure build-up to inflate the cuff. A pressure monitoring lumen splices to the catheter tube to parallel the tube down to the distal end where it is in communication with the end of the catheter and also with the distal end of the cuff to register cuff pressure. An introducer shaft is provided to be inserted into the lumen to abut the plug to stiffen the catheter, thus facilitating insertion, and a stiffener spine at the cuff area of the catheter also provides rigidity to compensate for the weakening of the lumen resulting from the transverse ports. A cross-port between the pressure monitoring lumen and the main lumen distally of the cuff will register lumen pressure if both the main lumen and the monitoring lumen become occluded at the distal end of the catheter.
Stuart J. Marcadis - Portage IN James H. DeVries - Grand Rapids MI
Assignee:
DLP, Inc. - Grand Rapids MI
International Classification:
A61M 2900
US Classification:
604 96
Abstract:
A perfusion catheter for use in open heart surgery having an inflatable cuff adjacent the distal end in communication with the lumen of the catheter to self-inflate when perfusion liquid is introduced into the lumen. A plug in the lumen within the cuff causes lumen flow to by-pass from the proximal end of the cuff to the distal end of the cuff through transverse parts in the lumen. A flow restriction at the distal end of the lumen causes pressure build-up to inflate the cuff. A pressure monitoring lumen splices to the catheter tube to parallel the tube down to the distal end where it is in communication with the end of the catheter and also with the distal end of the cuff to register cuff pressure. An introducer shaft is provided to be inserted into the lumen to abut the plug to stiffen the catheter, thus facilitating insertion, and a stiffener spine at the cuff area of the catheter also provides rigidity to compensate for the weakening of the lumen resulting from the transverse ports. A cross-port between the pressure monitoring lumen and the main lumen distally of the cuff will register lumen pressure if both the main lumen and the monitoring lumen become occluded at the distal end of the catheter.
Balloon Catheter Having Retention Enhancements On The Balloon
Stuart J. Marcadis - Portage IN James H. Devries - Grand Rapids MI
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61M 2900
US Classification:
604 96
Abstract:
A catheter for retrograde perfusion of the heart through the coronary sinus, which has an infusion lumen for introducing perfusion liquid into the heart, a retention means such as an inflatable balloon, and can have retention enhancements such as spikes, felt or a hydrophilic coating, on the surface of the retention means to keep it firmly in place.