B BRAUN 4892098 Nerve Stimulator

Condition: New
Part #: 4892098

$1,700.00

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4892098 B.Braun
4163214P B.BRAUN
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Stimuplex® HNS12 with SENSe is a peripheral nerve stimulator for single and continuous nerve block and was rated the best overall stimulator in a clinical evaluation1 of thirteen machines from five different manufacturers, scoring a perfect 20/20.

Design Advantages

Patented mode of functionality called SENSe, (Sequential Electrical Nerve Stimulation) can be turned on to help find the nerve sooner and maintain the motor response for longer.
Pulse duration can be changed, (0.1, 0.3 and 1.0 Ms) to target motor/ sensory nerve component for greater flexibility.
Disconnectand current threshold alarms provide audible alerts to reduce patient risk.
Resistance monitoring shows relationship between actual patient and desired current level for increased safety..

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Description

The B. Braun 4892098 Stimuplex® HNS12 is a gold-standard peripheral nerve stimulator designed to provide unmatched precision in regional anesthesia. Engineered for both single-shot blocks and continuous catheter placements, the HNS12 utilizes proprietary technology to help clinicians localize nerves with extreme accuracy. Its compact, ergonomic design and advanced safety feedback systems make it an essential tool for anesthesiologists seeking to improve block success rates while ensuring patient safety.


Core Technology: The SENSe™ Advantage

The standout feature of the HNS12 is the patented SENSe™ (Sophisticated Electrical Nerve Stimulation) technology.

Traditional stimulators often require frequent current adjustments to find the target nerve. The SENSe™ mode revolutionizes this by using a sequential triple-pulse pattern. At the start of the localization process, the device emits a high-frequency pulse followed by two lower-frequency pulses. This “triple-pulse” architecture allows the clinician to elicit a visible muscle twitch even when the needle is at a significant distance from the nerve, providing a much earlier warning and a smoother transition as the needle approaches the target.


Mechanism of Action

The HNS12 functions by delivering controlled electrical charges through a specialized insulated needle (such as the Stimuplex® Ultra 360®).

  1. Pulse Emission: The device generates a constant-current square wave pulse.

  2. Depolarization: As the needle tip nears a peripheral nerve, the electrical field causes the nerve membrane to depolarize.

  3. Muscle Response: This depolarization triggers a motor response (muscle twitch) in the corresponding distribution.

  4. Precision Tuning: The HNS12 monitors real-time impedance and current delivery, ensuring that the electrical impulse remains constant regardless of tissue resistance, which is critical for preventing accidental nerve contact.


Applications and Clinical Uses

The Stimuplex® HNS12 is versatile enough for a wide range of regional anesthesia procedures:

  • Upper Extremity Blocks: Interscalene, supraclavicular, infraclavicular, and axillary plexus blocks.

  • Lower Extremity Blocks: Femoral, sciatic (popliteal and transgluteal), and adductor canal blocks.

  • Continuous Catheterization: Providing electrical stimulation through the catheter to verify correct placement for long-term pain management.

  • Pediatric Anesthesia: Utilizing the 0.05 ms pulse duration for high-precision localization in smaller patients.


Key Advantages

  • Enhanced Sensitivity: The SENSe™ mode provides a basic response at a greater distance, reducing the “needle-hunting” phase.

  • Digital Feedback: A high-contrast LCD displays the actual current delivered, target current, pulse duration, and frequency.

  • Impedance Monitoring: Visual and audible alarms alert the clinician to high impedance, which can indicate a disconnected lead or a needle tip in a non-conductive environment (like a dry nerve).

  • Precise Control: The current can be adjusted in increments of 0.02 mA in the “Precision Mode,” allowing for extremely fine-tuned localization.


Technical Specifications

Feature Specification
Model Number 4892098 (Stimuplex HNS12)
Current Range 0–5.00 mA (Adjustable)
Precision Mode 1 mA (0.02 mA increments)
Pulse Duration Adjustable: 0.05 ms, 0.10 ms, 0.30 ms, 0.50 ms, 1.0 ms
Stimulation Frequency 1 Hz or 2 Hz
Technology SENSe™ (Triple-pulse) & Standard (Single-pulse)
Power Source 9V Alkaline Battery
Safety Compliance IEC 60601-1, IEC 60601-2-10

Frequently Asked Questions

What is the benefit of the SENSe mode compared to standard stimulation?

The SENSe mode uses a triple-pulse pattern that allows clinicians to detect nerves from a greater distance than single-pulse stimulators. By providing a muscle response earlier in the needle advancement, it reduces the need for aggressive current adjustments and helps the clinician navigate toward the nerve more safely and efficiently.

Can I use the HNS12 for both single-shot and continuous catheter blocks?

Yes, the Stimuplex HNS12 is fully compatible with both single-shot insulated needles and stimulating catheters. Its ability to monitor impedance in real-time is particularly useful when placing catheters, as it ensures the electrical connection is maintained throughout the threading process to verify correct positioning.

What does the impedance monitoring feature actually do?

The HNS12 measures the electrical resistance (impedance) between the needle tip and the skin electrode. If the impedance becomes too high—due to a loose cable or a needle tip in bone or air—the device will trigger an audible alarm and visual warning, preventing unreliable stimulation data.

How precise are the current adjustments on this device?

The device offers exceptional precision. In its standard range, you can adjust current from 0 to 5 mA. When using the precision mode (1 mA range), the HNS12 allows for adjustments in increments of 0.02 mA, providing the fine control required for advanced regional blocks.

Is the HNS12 screen easy to read in a darkened operating room?

The HNS12 features a large, high-contrast LCD that clearly displays all critical parameters simultaneously, including current, pulse duration, and frequency. This ensures that the anesthesia team can monitor the stimulation settings and patient feedback even in low-light surgical environments.

What kind of maintenance does the Stimuplex HNS12 require?

The HNS12 is designed for high-durability intraoperative use. Beyond routine cleaning and ensuring a fresh 9V battery is installed, the device performs an automatic self-check every time it is powered on to verify internal circuitry and calibration, ensuring it is always ready for clinical use.

Listing Terms & Conditions

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Due to worldwide shipping delays, it is possible that items listed could be on backorder. If the item is unavailable for an extended period, we sincerely apologize for the delay. In this case, we will refund you as soon as we are notified of the backorder and contact you with the confirmation of refund.