Amplatz sheath

After dilatation an Amplatz sheath is inserted over the last dilator. The dilators are then removed leaving only the Amplatz sheath and a guidewire in position. Once the tumor is visualized biopsies are taken both of the tumor and of the apparently normal renal pelvis. The tumor is then resected with diathermy. Tamponade of the tract is maintained with a 30-F nephrostomy catheter. The following day brachytherapy is given to the track to ensure that track tumor implantation does not occur (WooDHOUSE et al. 1986). It is stressed that this treatment is used only for low grade TCC or as... 

The common angiographic catheter is an important tool for lead extraction. One such catheter is the conunon angled pigtail catheter. This catheter can be used to retrieve and position electrodes by the femoral approach. Other catheters used to assist in lead extraction include a right Judkin s coronary catheter, multipurpose coronary catheter, and Amplatz catheter (Microvena Corp., White Bear Lake, MN). The catheters are usually passed femorally through a sheath. 

Inner sheath plus wire loop Amplatz snare... 

Recanalization of tight occlusions of the left innominate vein, which has a long mediastinal course, as may be caused by mediastinal tumor or fibrosis, can require a combined femoral and axillary or a bilateral axillary approach (Fig. 5.6). When the guidewire has crossed the occlusion, it is grasped with a snare, a basket, or a flexible forceps on the other side, and retrieved through the haemostatic valve sheath at the second percutaneous entry point. This makes it possible to insert a PTA catheter or any other stent delivery catheter over a stiff Amplatz-type guidewire, which is controlled and straightened at both ends. 

The original clamshell device was first introduced in 1989. It consisted of a double umbrella composed of four stainless steel arms covered with a polyester (Dacron ) meshwork. Each arm had a single springed hinge (see Fig. IS.S). - At the time of its introduction, double-umbrella devices were attractive because they offered the potential for minimal blood-flow pattern distortion due to their low profile. Additionally, since they possessed low alloy content, their corrosive potential was minimal. This device was deployed using an IIF sheath, which was smaller than the sheaths used by other devices at the time, but larger than those employed by the current Amplatzer Septal Occluder. ... 

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