Wisconsin Index Nomogram (WIN) of Mazeh et al

Description

Mazeh et al developed a nomogram which can be used during surgery to determine if another hyperfunctioning parathyroid gland is present. This can be used in conjunction with the change in serum parathyroid hormone levels to determine if surgery needs to be continued. The authors are from the University of Wisconsin.

Parameters:

(1) preoperative serum calcium in mg/dL

(2) preoperative serum parathyroid hormone (PTH) in pg/dL

(3) parathyroid gland weight in milligrams

Wisconsin index =

= (preoperative serum calcium) * (preoperative serum PTH)

Index	Risk Group
<= 800	low
801 to 1600	intermediated
> 1600	high

The percent of patients with another enlarged parathyroid gland can be estimated from a plot of the parathyroid gland weight and risk group (Figure 5, page 140). The curves can be approximated by.

Risk Group	Gland Wgt	Percent with Another Enlarged Parathyroid Gland
low	100 to 400	139.7 - (0.6753 * (weight)) + (0.000908 * ((weight)^2))
low	400 to 1,000	30.09 - (0.04934 * (weight)) + (0.000020 * ((weight)^2))
intermediate	100 to 600	124.4 - (0.3465 * (weight)) + (0.000273 * ((weight)^2))
intermedate	600 to 1,000	24.47 - (0.02075 * (weight))
high	100 to 400	119.7 - (0.2362 * (weight)) + (0.000273 * ((weight)^2))
high	400 to 1,000	87.42 - (0.03392 * (weight)) - (0.000034 * ((weight)^2))

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Description

Specialty

ICD-10