A surgical instrument includes a handle portion and a body portion extending distally from the handle portion and defining a first longitudinal axis. In particular, the invention relates to a process for the production of thiazolidine base and salts thereof which is characterized in that hexamethylenetetramine of formula 1is caused to react with cysteamine or salts thereof of formula 2in which X represents an acid residue, X being preferably a halide or sulfate. The stent provides a micro-porous support structure with good tensile strength that is adhesively bound to the lumen. The remaining sour gas fractions stripped of sulfur components are fed to the Claus reaction chamber and are mixed with the combustion gases leaving the burner. The apparatus may be directly connected to NMR or MRI. A set of compensator cables are attached to a bottom of the car and engaged with a compensator drum.