Peres nomogram

Q: What is Peres Nomogram?

Answer: Peres Nomogram is a rule of thumb to ascertain internal jugular central venous catheter's insertion depth based on patient height in centimeters. It was proposed by Dr. Peres from sydney, Australia.

For right internal jugular vein central venous catheters, "height (cm)/10" would provide the appropriate depth of insertion. For example, for a 160-cm tall person, a catheter would be inserted to 16 cm deep but for a 200-cm tall person, the depth would be 20 cm.

For left internal jugular, central venous catheter placements, "height (cm)/10 + 4" would provide the appropriate depth of insertion. For a 160-cm tall person, a catheter would be inserted to 20 cm. For a 200-cm tall person, the depth would be 24 cm. 

It may be of interest to know that external jugulars have been accessed in past for central line with more frequency. In original nomogram external jugulars were mentioned along with internal jugulars.

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Reference:

Peres PW. Positioning central venous catheters--a prospective survey. Anaesth Intensive Care. 1990 Nov;18(4):536-9. doi: 10.1177/0310057X9001800422. PMID: 2268022.