Tools, Technologies and Training for Healthcare Laboratories

Quality Requirements

Winchester Medical Center Verification of Sigma Performance

Winchester Medical Center, part of the Valley Health System, in Winchester, Virginia, has become the first laboratory in the United States to receive its Sigma Verification of Performance. It was long overdue.

 Winchester Medical Center Verification of Sigma-metric Performance

Original Verification: April 28th, 2017
Current Verification: December 1st, 2020 through December 31st, 2021

In April of 2017, Westgard QC was pleased to verify the performance of Winchester Medical Center in Virginia.

Winchester Medical Center Sigma VP, Sten Westgard, and Dr Joseph Litten

"A not-for-profit hospital, Winchester Medical Center has been serving the region since 1903. As a regional referral center, Winchester Medical Center is a resource for more than 400,000 residents in the northern Shenandoah Valley of Virginia, Eastern Panhandle of West Virginia and western Maryland. Our experienced team of physicians provides comprehensive, high quality care and access to specialists right here in Winchester. We offer a broad spectrum of services – from diagnostic and medical procedures to advanced surgical options and rehabilitative care. Winchester Medical Center is a:

  • Level II Trauma Center
  • Chest Pain Center
  • Advanced Primary Stroke Center
  • Level 4 Epilepsy Center
  • Level III Neonatal Intensive Care Unit (NICU)
  • Magnet Designated Hospital"

Dr. Joseph Litten has been an early adopter of Six Sigma metrics, using it to benchmark vendors as early as 2008, long before the Sigma Verification program existed. Dr. Litten also provided a chapter detailing his experiences in the latest edition of Clinics in Laboratory Medicine that we helmed.

The original verification was completed on three ARCHITECT chemistry instruments and three immunoassay instruments. In 2019, the the instruments are now Alinity for chemistry and immunoassy. The analytes verified include

Not only is there are strong consistency in performance from instrument to instrument, there is an equally strong consistency from quarter to quarter. Winchester Medical Center has years worth of performance data and very steady high Sigma-metrics.

Chemistry and Urine Assays

Chemistry Assay

ALINITY  cc 1

ALINITY cc 2

ALINITY cc 3

Albumin

Six Sigma

Six Sigma

Six Sigma

ALT

Six Sigma

Six Sigma

Six Sigma

Alkaline Phosphatase

Six Sigma

Six Sigma

Six Sigma

Amylase

Six Sigma

Six Sigma

Six Sigma

AST

Six Sigma

Six Sigma

Six Sigma

Bilirubin, Direct

Six Sigma

Six Sigma

Five Sigma

Bilirubin, Total

Four Sigma

Four Sigma

---

Calcium

Six Sigma

Six Sigma

Six Sigma

Chloride

Six Sigma

Five Sigma

Five Sigma

Cholesterol

Six Sigma

Six Sigma

Six Sigma

Creatinine

Five Sigma

Five Sigma

Six Sigma

Glucose

Six Sigma

Six Sigma

Six Sigma

GGT

Six Sigma

Six Sigma

Not run

HDL

Six Sigma

Six Sigma

Six Sigma

LDL

Six Sigma

Six Sigma

Six Sigma

Lactate

Six Sigma

Six Sigma

Six Sigma

Lithium

Six Sigma

Six Sigma

Six Sigma

LDH

Six Sigma

Six Sigma

Six Sigma

Magnesium

Six Sigma

Six Sigma

Six Sigma

Phosphorous

Six Sigma

Six Sigma

Six Sigma

Potassium

Six Sigma

Six Sigma

Six Sigma

Prealbumin

Six Sigma

Six Sigma

Four Sigma

Sodium

---

Four Sigma

Four Sigma

Total Protein

Six Sigma

Six Sigma

Six Sigma

Triglycerides

Six Sigma

Six Sigma

Six Sigma

Urea

Four Sigma

---

---

Uric Acid

Six Sigma

Six Sigma

Six Sigma

 Immunoassays

Immunoassay

ALINITY  IA 1

ALINITY  IA 2

ALINITY  IA 3

Folate

Four Sigma

Four Sigma

Not run

FSH

Four Sigma

Four Sigma

Not run

LH

Six Sigma

Six Sigma

Not run

TSH

Six Sigma

Six Sigma

Not run

Estradiol

Six Sigma

Six Sigma

Not run

Prolactin

Not run

Five Sigma

Not run

Cortisol

Five Sigma

Four Sigma

Not run

Total T4

Six Sigma

Six Sigma

Not run

CEA

Four Sigma

Not run

Not run

Vancomycin

Six Sigma

Six Sigma

Six Sigma

Progesterone

Six Sigma

Five Sigma

Not run

Theophylline

Five Sigma

Five Sigma

Not run

Testosterone

Four Sigma

Four Sigma

Not run

  • World Class = Six Sigma performance
  • Excellent = Five Sigma performance
  • Good = Four Sigma performance

Performance of Winchester Medical Center

2020 Winchester re vp cc 1

2020 Winchester re vp cc 2

2020 Winchester re vp cc 3

 2020 Winchester re vp ia 1

2020 Winchester re vp ia 2

2020 Winchester re vp ia 3

 

 

 

 

 

Winchester Medical Center Laboratory Staff

Winchester Medical Center Staff and Sten Westgard

Congratulations to Winchester Medical Center on their well-deserved verification of performance.

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