On Call Extra Blood Glucose Test Strips: Accuracy, Compatibility, and Testing Guide

On Call Extra Blood Glucose Test Strips (manufactured by ACON Laboratories) are advanced biosensor test strips designed for quantitative self-monitoring of capillary whole blood glucose levels in diabetes management. Featuring auto-coding technology and requiring a minuscule 0.4 µL blood sample, On Call Extra strips deliver clinical laboratory-grade accuracy within 4 seconds, complying with rigorous ISO 15197:2013 standards.

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1. Technical Specifications of On Call Extra Strips

2. On Call Extra vs. On Call Plus: Critical Compatibility Differences

A common clinical mistake is mixing test strips across different meter models within the ACON On Call ecosystem:

        ┌─────────────────────────────────────────────────────────────┐
        │                 ACON ON CALL PRODUCT FAMILY                 │
        └──────────────────────────────┬──────────────────────────────┘
                                       │
                ┌──────────────────────┴──────────────────────┐
                ▼                                             ▼
    ┌───────────────────────────┐                 ┌───────────────────────────┐
    │     ON CALL EXTRA / VOICE │                 │       ON CALL PLUS        │
    │  - No Code Chip Required  │                 │  - Requires Code Chip     │
    │  - 0.4 µL Blood Sample    │                 │  - 1.0 µL Blood Sample    │
    │  - 4-Second Read Time     │                 │  - 10-Second Read Time    │
    └───────────────────────────┘                 └───────────────────────────┘
                ▲                                             ▲
                │                                             │
      [ Incompatible Strips ] ───────────────────────► [ Separate Cassettes ]

• On Call Extra Strips: Compatible ONLY with the On Call Extra, On Call Extra Voice, and On Call Extra Mobile meters. They do not need a code chip.

• On Call Plus Strips: Compatible ONLY with the On Call Plus and On Call EZ II meters. They require the matching black calibration code chip inserted into the meter.

• Safety Warning: Inserting On Call Plus strips into an On Call Extra meter will result in a reading error (e.g., Error E-1 or E-4) and will not record blood glucose.

3. Step-by-Step Testing Procedure

1. Hygiene Preparation: Wash hands thoroughly with warm water and soap; dry completely. Avoid alcohol wipes immediately before testing, as residual alcohol dilutes the sample.

2. Insert the Strip: Insert an On Call Extra test strip into the meter’s test port in the direction indicated by the contact bars. The meter will power on automatically and display a flashing blood drop symbol.

3. Lance the Fingertip: Use a sterile lancet and lancing device on the side of the fingertip. Gently massage the finger to form a round $0.4\ \mu\text{L}$ capillary blood droplet.

4. Sample Application: Touch the tip of the test strip to the blood drop. The capillary action window will automatically draw blood into the reaction chamber.

5. View Results: The meter counts down from 4 to 1 and displays the blood glucose value in $\text{mg/dL}$. Eject the used strip safely using the strip ejector button.

4. Proper Storage and Handling Guidelines

• Vial Storage Temperature: Keep test strip vials sealed at $2^\circ\text{C}$ to $30^\circ\text{C}$ ($36^\circ\text{F}$ to $86^\circ\text{F}$). Do not freeze.

• Immediate Cap Closure: Always close the vial cap tightly immediately after taking out a strip. Exposure to room humidity degrades the dried enzyme layer.

• Shelf Life & Expiration: Use strips within 6 months (180 days) after first opening the vial or prior to the printed expiration date, whichever comes first.

Frequently Asked Questions (FAQs)

1. Are On Call Extra strips compatible with the On Call Plus glucometer?

No. On Call Extra strips work only with the On Call Extra and On Call Extra Voice meters. They are not cross-compatible with On Call Plus or other brands.

2. Do On Call Extra test strips require a calibration code chip?

No. On Call Extra features auto-coding technology. The meter calibrates automatically upon strip insertion without requiring a manual chip.

3. How much blood is needed for an On Call Extra test?

The test strip requires a minimal sample volume of just 0.4 µL of capillary whole blood.

4. How long does the On Call Extra meter take to display the blood sugar reading?

Results are delivered in 4 seconds after adequate blood is absorbed into the reaction zone.

5. What should I do if the meter displays an error message?

Common error codes include E-1 (strip inserted incorrectly or defective), E-2 (sample applied too early or insufficient blood volume), and E-4 (temperature outside operating range of $5^\circ\text{C}\text{–}45^\circ\text{C}$). Check user manual instructions or retest with a fresh strip.

6. What is the typical hematocrit range supported by these strips?

On Call Extra strips support an extended hematocrit range of 25% to 60%, minimizing reading distortions in anemic patients or individuals with higher blood viscosities.

7. Can I reuse an On Call Extra test strip?

No. Test strips are single-use disposable in-vitro diagnostic items. Reusing a strip will cause inaccurate readings or meter errors.

8. How many strips come in a standard pack?

On Call Extra strips are packaged in boxes of 50 strips (2 vials of 25 strips) or 100 strips (4 vials of 25 strips), often bundled with sterile lancets.

9. Can I use blood from alternate sites (forearm, palm)?

Yes. Alternate Site Testing (AST) is supported for stable blood glucose periods (e.g., fasting or pre-meal). For post-meal or post-exercise checks when glucose fluctuates rapidly, fingertip capillary testing is recommended.

10. Where can I buy authentic On Call Extra test strips in India?

You can buy authentic, fresh-dated On Call Extra Blood Glucose Test Strips (50 Pack) online with fast dispatch and nationwide delivery from Microsidd India.

Authorized Medical Supply & Support — Microsidd India

Microsidd India is an established distributor of diabetes care devices, rapid diagnostic test kits, point-of-care analyzers, and hospital medical consumables.

• Business Name: Microsidd India

• Address: #09, Green Chambers, 14th Cross, RT Nagar, Bangalore, Karnataka 560032, India

• Official Store: microsidd.com

• Google Business Profile: https://share.google/86yELDhlVVNPEABXd

• Support Availability: Monday – Saturday | 10:00 AM – 6:00 PM IST

• Key Offerings: Glucometers, On Call Extra / On Call Plus Strips, HbA1c Machines, Lancets, Blood Collection Tubes

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