The B. Braun Certofix Nerve Stimulator is a high-performance clinical instrument engineered for precision, safety, and flexibility in peripheral nerve block procedures. Developed by B. Braun, a global leader in regional anesthesia technology, this device provides clinicians with the essential tools required for both single-injection and continuous nerve stimulation.
In modern anesthesia, successful regional blocks depend on the accurate localization of neural structures. Models 4892098 and 4163214P are designed to streamline this process, offering an intuitive user interface and sophisticated feedback mechanisms that ensure reliable results even in complex anatomical scenarios.
As a cornerstone of a professional regional anesthesia setup, the B. Braun Certofix (Stimuplex HNS12) provides the reliability needed for high-volume surgical centers and pain management clinics. Whether you are upgrading your peripheral nerve block equipment or establishing a new anesthesia suite, this device integrates seamlessly into your clinical workflow.
Core Technology: Patented SENSe Algorithm
The cornerstone of the Certofix Nerve Stimulator is the patented SENSe (Sequential Electrical Nerve Stimulation) technology. While conventional stimulators deliver a consistent pulse, SENSe utilizes a unique sequence of three pulses: two short pulses and one long pulse.
This technological innovation allows for:
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Faster Nerve Localization: It maintains a motor response even as the needle is being advanced, reducing the time required to find the target nerve.
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Increased Sensitivity: Enhanced detection of the threshold current allows for more precise needle tip positioning relative to the nerve.
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Stable Motor Response: Provides a consistent visual cue for the clinician, minimizing the “flicker” associated with standard stimulation.
Mechanism of Action
The Certofix Stimulator works by delivering a controlled electrical current through a specialized insulated needle. As the needle tip approaches a peripheral nerve, the current triggers a localized motor response (muscle twitch).
The device features real-time resistance monitoring, which continuously measures the impedance between the needle tip and the neutral electrode. This ensures that the current delivered matches the setting on the dial, compensating for variations in tissue density and ensuring constant current delivery for maximum clinical accuracy.
Clinical Applications and Uses
The B. Braun Certofix Nerve Stimulator is an essential tool for an array of regional anesthesia and pain management procedures:
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Upper Extremity Blocks: Including interscalene, infraclavicular, and axillary blocks.
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Lower Extremity Blocks: Including femoral, sciatic, and popliteal nerve blocks.
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Continuous Catheter Placement: Assisting in the accurate positioning of catheters for long-term pain management.
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Dual Guidance: Often used in conjunction with ultrasound to provide secondary physiological confirmation of nerve proximity.
Optimized for Various Medical Environments
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For Specialized Pain Clinics: An essential piece of peripheral nerve block equipment for clinics focused on chronic pain management and long-term catheter placement.
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In Hospital Emergency & Operating Rooms: Designed for rapid regional anesthesia setup, allowing for quick nerve localization during time-sensitive procedures.
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Portable Solutions for Mobile Anesthesia Teams: Its compact size and battery-operated design make it the preferred portable nerve stimulator for traveling anesthesiologists.
Key Advantages
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Adjustable Pulse Durations: Features settings for 0.1 ms, 0.3 ms, and 1.0 ms, allowing clinicians to target specific motor or sensory components depending on the procedure type.
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Advanced Safety Alarms: Includes audible disconnect alarms and threshold alerts to prevent accidental high-current delivery and ensure patient safety throughout the procedure.
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Intuitive Interface: Large, easy-to-read digital display showing current (mA), pulse duration (ms), and stimulation frequency (Hz).
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High-Fidelity Feedback: The real-time resistance monitor allows clinicians to identify accidental intravascular or intraneural needle placement through changes in impedance.
Performance Edge Comparison
| Feature | B. Braun Certofix Stimulator | Conventional Stimulators |
| SENSe Technology | Yes (Patented Sequence) | No (Standard Pulsing) |
| Pulse Durability | 0.1, 0.3, and 1.0 ms | Often Fixed |
| Safety Monitoring | Real-time Resistance/Impedance | Basic or None |
| Alarms | Disconnect & Threshold Alarms | Basic Audible Cues |
Treatment Process
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Preparation: The patient is positioned, and the neutral electrode is applied. The Certofix unit is powered on and calibrated.
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Initial Localization: The pulse duration is typically set to 0.1 ms with a higher starting current (e.g., 1.0–1.5 mA).
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Needle Advancement: Using the SENSe mode, the needle is advanced until a motor response is observed.
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Refinement: The current is gradually decreased. A muscle twitch maintained at a low current (typically between 0.3 mA and 0.5 mA) confirms optimal proximity to the nerve.
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Monitoring: The clinician monitors the resistance display to ensure stable needle positioning before injecting the anesthetic.
Technical Specifications
| Detail | Specification |
| Model Numbers | 4892098 / 4163214P |
| Manufacturer | B. Braun |
| Pulse Durations | 0.1 ms, 0.3 ms, 1.0 ms |
| Current Range | 0.00 – 5.00 mA |
| Stimulation Frequency | 1 Hz / 2 Hz |
| Safety Features | Threshold Alarms; Disconnect Alarms; Impedance Monitoring |
| Battery Type | Standard 9V Alkaline |
Frequently Asked Questions
What is the benefit of SENSe technology in the B. Braun Certofix?
SENSe (Sequential Electrical Nerve Stimulation) is a patented pulse sequence that helps clinicians locate nerves faster and more accurately. By delivering a specific pattern of pulses, it provides a more stable motor response, making it easier to track the needle’s proximity to the nerve without losing the muscle twitch.
How do the different pulse duration settings (0.1, 0.3, 1.0 ms) help during a block?
Different settings allow for specialized targeting. A shorter pulse (0.1 ms) is typically used for motor nerve stimulation with high precision. Longer pulses (0.3 or 1.0 ms) are more effective for stimulating sensory nerves or for certain continuous catheter placement techniques where a wider electrical field is required.
Why is real-time resistance monitoring important for nerve stimulators?
Resistance monitoring measures the electrical impedance between the needle and the tissue. High resistance may indicate a poor connection or that the needle is in a dry tissue plane, while very low resistance could indicate intravascular placement. This feedback ensures the delivered current is accurate and safe.
Does the Certofix Stimulator provide audible feedback?
Yes. The device is equipped with several audible safety features, including a disconnect alarm if the lead becomes unattached and a threshold alarm. These alerts ensure the clinician is immediately notified of any interruption in therapy or changes in the patient’s stimulation status.
How does this device fit into a continuous peripheral nerve block (CPNB) setup?
The B. Braun Certofix is designed for both single-injection and continuous nerve stimulation. Its adjustable settings and precise current delivery make it an ideal choice for confirming the correct placement of catheters used in long-term postoperative pain management.
What is the significance of the threshold alarm?
The threshold alarm notifies the clinician when the stimulation current reaches a pre-set low level. This is critical for preventing the needle from coming too close to the nerve (intraneural placement), thereby reducing the risk of post-procedure nerve damage and enhancing overall patient safety.
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