ESR-10 Manual Rack
INSTRUCTIONS FOR USE
INTENDED USE
ESR-10 Manual Rack is a manual Modified Westergren system used for determining the erythrocyte
sedimentation rate (ESR) of whole blood in 30 minutes using Streck ESR-Vacuum Tubes.
SUMMARY AND PRINCIPLES
The ESR test is a common laboratory test used to indicate patient conditions such as acute tissue damage,
chronic infection and chronic inflammation. The ESR test measures the rate that erythrocytes separate
from human plasma and settle to the bottom of a tube of anticoagulated blood. ESR results are reported in
millimeters that the plasma-erythrocyte interface falls in a designated perpendicular tube of anticoagulated
whole blood per hour. ESR results become elevated due to the formation of erythrocyte rouleaux, which is
caused mainly by alterations in plasma and erythrocyte factors.
The ESR-10 Manual Rack is designed to accurately measure the sedimentation rate of erythrocytes in 30
minutes using 1.2 ml ESR-Vacuum Tubes. The ESR-10 Manual Rack allows the user to report the result
obtained directly from the measuring scale supplied with the rack. Results are reported as millimeters per
hour (mm/hr) Modified Westergren Method by using the QuickMode conversion for measuring ESR in only
30 minutes.
There may be situations where the sample cannot be analyzed immediately after it is drawn and must be
transported or preserved for future analysis. ESR-Vacuum Tubes preserve the integrity of the patient sample
for sed rate analysis until processing and testing can be performed. Samples can be maintained from the time of
blood collection for up to 72 hours prior to analysis when transported and stored at 2 ºC-10 ºC, or up to 4 hours at
18 ºC-30 ºC.
PRECAUTIONS
1. For In Vitro Diagnostic Use.
2. All patient blood samples should be treated as if they are capable of transmitting infections and should
be handled with appropriate precautions. Avoid contact with skin and mucous membranes.
3. Used tubes containing blood should not be disposed of in general waste, but should be disposed with
infectious medical waste.
4. The ESR test is sensitive to temperature, tube angle and vibration. It is important to place the stand
on a level surface where there is no draft. Avoid placing the test rack next to windows, centrifuges, air
vents, etc.
5. Do not adjust the position of the tube in the rack by pulling on the stopper.
6. This product is intended for use as supplied. Adulteration of any materials to the product as supplied
invalidates any diagnostic use of the product.
STORAGE AND STABILITY
The ESR-10 Manual Rack may be stored at 2 ºC-30 ºC.
INDICATION OF PRODUCT DETERIORATION
1. Inability to obtain expected ESR results may indicate product deterioration.
2. Repeat the ESR test to confirm erroneous results; if the same result is obtained, contact Streck Technical
Services at 800-843-0912 or [email protected].
INSTRUCTIONS FOR USE
Rack Installation
1. Insert the three adjustable leveling feet supplied with the rack into the predrilled holes on the bottom
of the rack.
2. Place the rack on a level surface that is free from vibration and temperature fluctuation. Avoid placing
the rack in areas that receive direct sunlight or are in close proximity to air vents from heating/cooling
systems.
3. Adjust the rack to level by turning the adjustable leveling feet until the bubble in the circular spirit level
is centered in the circle printed on the top of the level.
4. Insert the measuring scale supplied with the rack into the slot on the front face of the rack with the
printed side facing forward.
Sample Preparation
1. Obtain a nonhemolyzed blood specimen and warm to room temperature (18 ºC-30 ºC) for at least 15
minutes prior to analysis. Blood specimens may be drawn in or transferred into a Streck ESR-Vacuum
Tube. Refer to tube IFU.
2. Verify the specimen is well-mixed and free from clots.
NOTE: The mixing process prior to evaluation of
an ESR sample is critical. A well-sedimented sample may require several minutes of mixing prior to
testing.
3. Each tube position is marked with red circle numbered one through 10. Place the ESR-Vacuum Tube in
any free position with the stopper in the upright position.
4. Align the tube so that the bottom of the liquid meniscus is in line with the zero position on the
measuring scale.
NOTE: Do not adjust the position of the tube in the rack by pulling on the stopper.
5. Allow the sample to settle in an undisturbed, vertical position for 30 minutes.
6. At 30 ± 1 minute, record the numerical value at the top of the column of sedimented erythrocytes. Read
the bottom of the meniscus at eye level. Report the result as mm/hr Modified Westergren method.
LIMITATIONS
1. ESR-10 Manual Rack is to be used for Erythrocyte Sedimentation Rate testing only. It is not intended for
performing other hematology sample analysis.
2. Tube angle, vibration and fluctuations in temperature may adversely affect the accuracy of ESR results
obtained with the ESR-10 Manual Rack.
3. The reportable range of the ESR-10 Manual Rack is 0-100 mm/hr.
EXPECTED RESULTS
Results obtained from fresh whole blood specimens collected properly in a 1.2ml ESR-Vacuum Tube and
tested on an ESR-10 Manual Rack will correlate with the Modified Westergren method.
ORDERING INFORMATION
Please call our Customer Service Department toll free at 800-228-6090 for assistance. Additional
information can be found online at streck.com.
GLOSSARY OF SYMBOLS
See the Instructions (IFU) tab under Resources on the product page at streck.com.
See streck.com/patents for patents that may be applicable to this product.
The brand and product names of the instruments are trademarks of their respective holders.
350507-6
2022-02
Streck
7002 S. 109 Street, La Vista, NE 68128 USA
M
EDI
M
ARK®
Europe
11, rue Emile Zola, BP 2332
38033 Grenoble Cedex 2, France
EC REP
