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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

Verification: April 28th, 2017
Current Verification: October 1st, 2019 through October 31st 2020

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 Assay ALINITY cc 1 ALINITY cc 2 ALINITY cc 3
Albumin 6 Sigma 6 Sigma 6 Sigma
ALT 6 Sigma 6 Sigma 6 Sigma
Alkaline Phosphatase 6 Sigma 6 Sigma 6 Sigma

AST

6 Sigma

6 Sigma

4 Sigma

Bilirubin, Direct

6 Sigma

6 Sigma

6 Sigma

Bilirubin, Total

n/a

4 Sigma

5 Sigma

Calcium

6 Sigma

5 Sigma

6 Sigma

Chloride

5 Sigma

6 Sigma

6 Sigma

Cholesterol

6 Sigma

6 Sigma

6 Sigma

Creatinine Kinase

6 Sigma

6 Sigma

6 Sigma

Creatinine

5 Sigma

5 Sigma

6 Sigma

Glucose

6 Sigma

6 Sigma

6 Sigma

GGT

6 Sigma

6 Sigma

6 Sigma

HDL

6 Sigma

6 Sigma

6 Sigma

LDL

6 Sigma

6 Sigma

6 Sigma

Lipase

Not run

Not run

Not run

LDH

4 Sigma

4 Sigma

6 Sigma

Magnesium

6 Sigma

6 Sigma

6 Sigma

Phosphorous

6 Sigma

6 Sigma

6 Sigma

Potassium

6 Sigma

6 Sigma

6 Sigma

Prealbumin

6 Sigma

Not run

Not run

Sodium

n/a

4 Sigma

4 Sigma

Total Protein

6 Sigma

6 Sigma

6 Sigma

Triglycerides

6 Sigma

6 Sigma

6 Sigma

Urea Nitrogen

4 Sigma

n/a

5 Sigma

Uric Acid

6 Sigma

5 Sigma

Not run

 Immunoassays

Immunoassay

ALINITY  IA 1

ALINITY  IA 2

ALINITY  IA 3

hCG

n/a

Not run on this inst

Not run on this inst

Ferritin

n/a

n/a

Not run on this inst

Folate

Not run on this inst

Four Sigma

Not run on this inst

FSH

Six Sigma

Five Sigma

Not run on this inst

LH

n/a

Six Sigma

Not run on this inst

TSH

Six Sigma

Six Sigma

Not run on this inst

Estradiol

Six Sigma

Six Sigma

Not run on this inst

Prolactin

Six Sigma

Five Sigma

Not run on this inst

PSA

Not run on this inst

Not run on this inst

Not run on this inst

AFP

Not run on this inst

Not run on this inst

Not run on this inst

Free T4

n/a

n/a

Not run on this inst

Cortisol

Not run on this inst

Five Sigma

Not run on this inst

Total T3

Not run on this inst

Not run on this inst

Not run on this inst

Total T4

Four Sigma

n/a

Not run on this inst

CEA

Five Sigma

n/a

Not run on this inst

Vancomycin

n/a

Six Sigma

n/a

Digoxin

Not run on this inst

Four Sigma

Five Sigma

Carbamazepine

Not run on this inst

Not run on this inst

Not run on this inst

Phenobarbital

n/a

Six Sigma

Six Sigma

Phenytoin

n/a

Not run on this inst

Not run on this inst

Progesterone

Not run on this inst

Six Sigma

Not run on this inst

Theophylline

n/a

Not run on this inst

Six Sigma

Testosterone

Six Sigma

Four Sigma

Not run on this inst

Vitamin B12

n/a

n/a

Not run on this inst

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

Performance of Winchester Medical Center

2019 Sigma re vp winchester cc 1

2019 Sigma re vp winchester cc 2

2019 Sigma re vp winchester cc 3

2019 Sigma re vp winchester ia 1

2019 Sigma re vp winchester ia 2

2019 Sigma re vp winchester 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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