Shengmei uses Fresenius dialysis machines, which hold the top market share. The 4008 and 5008 series account for nearly 80,000 units installed in China, making them widely trusted. These machines have a long service life—many are still in use after 15 to 20 years. Key advantages include:

1. Precision

• Dual-volume sealed balancing chambers: Using 30 ml balancing chambers (compared to 60 ml in other brands), achieving more accurate ultrafiltration.
• Adjustable blood pump tubing diameter (2–10 mm): Ensures accurate blood flow and supports use in children or patients with low blood flow—who make up a significant portion of cases.

2. Safety

• Pressure integrity testing of water systems: Unique test every 12.5 minutes for 20 seconds to ensure balanced fluid exchange and patient safety.
• Intelligent blood leak detection: Uses green light detection and infrared compensation to distinguish true and false blood leaks, with a detection accuracy of 0.5 ml/min (HCT = 0.25).
• Air monitoring: Combines ultrasonic and optical detection to prevent air embolism. Optical detectors can identify blood during needle insertion and pause accordingly to prevent blood loss. The 5008S series uses triple monitoring—ultrasonic, optical, and tubing—for enhanced safety.

3. Stability

• Low failure rate: Fresenius machines feature dual CPUs—one for monitoring and one for control—greatly improving stability and reliability.
• Long service life: Most hospital units last over 15 years.
• Ultrafiltration pump: Dual-pump system with high stability, long service life, and precise ultrafiltration.