Strecker stent

Hyoty MK,NordbackIH (1990) Biliary stent or surgical bypass in unresectable pancreatic cancer with obstructive jaundice. Acta Chir Scand 156 391-396 Jasche W, Klose KJ, Strecker EP (1992) A new balloon - expandable tantalum stent (Strecker-stent) for the biliary system preliminary experience. Cardiovasc Intervent Radiol 15 356-359... 

This stent has been modified from the original Strecker stent and consists of a woven nitinol mesh. It is available in covered and uncovered versions (Fig. 2.4), and... 

The nitinol Strecker stent was an earlier version of the uncovered Ultraflex stent and is very similar to it... 

Metallic stents were compared with laser therapy in a prospective triple-randomized study. A total of 60 patients with unresectable tumors were randomized to treatment with endoscopic laser therapy (18 patients), covered Wallstent endoprostheses (23 patients), and uncovered Strecker stents (19 patients). Both types of stents produced significantly better dysphagia relief than laser therapy (p<0.02) (Adam et al 1997). 

The second balloon-expandable stent type has been made from a single tantalum filament, which was woven into a cylindrical wire mesh. Again, the choice of thickness of the tantalum wire and the knitting technique determines the mechanical properties of this stent type. This particular stent type has been known as the Strecker stent (Boston Scientific, Natick, MA) (Strecker et al. 1990). This stent requires balloon dilatation for deployment like the Palmaz type stents. Generally, it is more flexible but also less resistant to compressive forces than the stainless steel balloon-expandable stents. Stents for use in the respiratory system came in lengths between 20 and 40 mm, and were expandable to diameters between 5 and 11 mm. Due to its relatively low radial forces, this particular stent had the unique feature of possible stent removal, thus it can be used for temporary stenting (Schmidt et al. 1999 Witt et al. 1997). 

In the series of Strecker stent placement in 21 patients, complications were reported in two. One stent compression and one stent dislocation occurred in two patients. Both stents were removed without problems (WiTT et al. 1997). In a smaller trial, one Strecker stent out of five dislocated 6 days after placement (ScHMiDT et al. 1999). In the series of Hauck et al. (1997), tumor ingrowth through the stent was seen in nine of 51 patients treated with Strecker or nitinol stents. Stent deformation occurred only with Strecker stents ( =12), but not in nitinol stents. Mucus retention was a frequent problem within the first 7 days after stent placement (39%). 

Strecker EP Gabelmann A, Boos I, et al. Effect on intimal hyperplasia of dexamethasone released from coated metal stents compared with non-coated stents in canine femoral arteries. Cardiovasc Intervent Radiol 1998 21 487-496,... 

Strecker EP, Boos I, Gottmann D, Vetter S and Haase W (2001) Popliteal artery stenting using flexible tantalum stents. Cardiovasc Intervent Radiol 24 168-175. 

Strecker EP, Boos I, Schmid G, Gottmann D and Vetter S (2000) Flexible tantalum stents for the treatment of renovascular hypertension a 10-year experiment. Eur Radiol 10 1144-1151. 

Strecker, E.-P., Gabelmann, A., Boos, I., Lucas, C., Xu, Z., Haberstroh, J., Freudenberg, N., Strieker, H., Longer, M., and Betz, E., Effect on intimal hyperplasia of dexamethasone released from coated metal starts compared with non-coated stents in canine femoral arteries, Cardiovasc. Intervent. Radiol., 1998 21(6) 487-4%. 

Balloon-expandable stents for example, Palmaz (Johnson 8c Johnson, Warren, NJ) and Tantalum Strecker (Boston Scientific). These stents are inserted mounted on an angioplasty balloon catheter and expanded by the balloon when in an optimum position across the stricture. Balloon-expandable stents are difficult to deploy around curves and have reduced radial force compared... 

Other types of stents such as the Strecker tantalum stent (SoLT and Papp 1993), the Strecker Nitinol stent (Strecker et al. 1995) or modified and covered Gianturco stents (Song et al. 1993) have been used only occasionally and not much experience exists with these stents. Recently, however, two series of 19 and 24 patients have been published advocating covered metallic expandable stents for prevention of tumour ingrowth after stenting for gastroduodenal obstruction (Jung et al. 2000 Park et al. 2001). 

Due to the development of newer self-expanding stents, which combine the flexibility of the tantalum stent with the strength to oppose compression of stainless steel stents, the Strecker tantalum stent is no longer produced. 

Strecker EP, Liermann D, Barth KH et al. (1990) Expandable tubular stents for treatment of arterial occlusive diseases experimental and clinical results. Radiology 175 87-102 Tan BS, Watkinson AF, Dussek JE, Adam AN (1996) Metallic endoprostheses for malignant tracheobronchial obstruction initial experience. Cardiovasc Intervent Radiol 19 91-96... 

Strecker EP, Boos IBL, Hagen B. Flexible tantalum stents for the treatment of iliac artery lesions long-term patency, complications, andriskfactors. Radiology 1996 204 87-96. 

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