Jacketed catheter probes and methods of use for infusion

A method for tissue infusion access using a tissue infusion access kit having a plurality of dilation probes;

• the method comprising:
• determining the desired depth and the desired width for the tissue infusion access site;
• selecting a depth dilation probe having at least one end equal to the desired depth;
• inserting a first end of the depth dilation probe into an elongated catheter, wherein the first end of the depth dilation probe extends distally beyond a distal end of the elongated catheter;
• rotating and advancing the first end of the depth dilation probe to dilate a tissue to a desired depth;
• removing the first end of the depth dilation probe from the elongated catheter;
• selecting a width dilation probe having at least one end equal to the desired width;
• inserting a second end of the width dilation probe into the elongated catheter, wherein the second end of the width dilation probe has an outer diameter greater than that of the first end of the depth dilator probe, and wherein the second end of the width dilation probe extends distally beyond the distal end of the elongated catheter;
• rotating and advancing the second end of the width dilation probe to dilate the tissue to a desired width and defining a dilated orifice;
• removing the second end of the width dilation probe from the elongated catheter;
• reinserting the first end of the depth dilation probe into the elongated catheter;
• advancing the first end of the depth dilation probe and the elongated catheter into the dilated orifice;
• removing the first end of the depth dilation probe;
• securing the elongated catheter in the dilated orifice;
• and
• infusing a fluid into the tissue.

An atraumatic tissue infusion access kit comprising:

• a plurality of solid double-ended dilator probes, each further comprising:
• a tapered distal end and a tapered proximal end engaged to a central portion;
• wherein the central portion of each of the plurality of solid double-ended dilator probes has a unique outer diameter in a range between 0.75 mm and 1.25 mm,
• wherein the tapered distal end has a length in a range between 40 mm and 80 mm and the tapered proximal end has a length in a range between 20 mm and 40 mm;
• and
• wherein the tapered distal end and the tapered proximal ends are configured for atraumatic dilation of tissue;
• a plurality of catheters, defining a cannula for tissue infusion and each having a proximal catheter end and a distal catheter end;
• wherein each of the plurality of catheters corresponds to a particular dilator probe and has an inner diameter equal to the unique outer diameter of the central portion of the corresponding dilator probes;
• wherein the tapered distal end of a first dilator probe is received in a first corresponding catheter to dilate the tissue to a desired depth and to insert the cannula into the tissue;
• and
• wherein the tapered proximal end of the first dilator probe is received in the first corresponding catheter to dilate the tissue to a desired width.