Anesthesia Vaporizer Sigma Delta (Isoflurane) - Good

Sigma Delta Vaporizer (Isoflurane): Precision and Reliability for Anesthetic Practices

The Sigma Delta by Penlon is a precision vaporizer designed for use with isoflurane in anesthetic systems. This vaporizer is an essential component in the administration of volatile anesthetic agents, enabling the delivery of a controlled concentration of isoflurane into the fresh gas flow directed to the patient. It integrates into continuous flow anesthetic systems, where it plays a crucial role in regulating the dosage and administration of the anesthetic in a stable and reliable manner.

The operation of the Sigma Delta relies on a design that ensures high performance even under varied usage conditions. It allows for precise regulation of the isoflurane concentration, ranging from 0 to 8%, depending on clinical requirements. The anesthetic concentration is adjusted via a control dial, which precisely modulates the gas flow into the vaporization chamber. This adjustment is accompanied by a temperature compensation mechanism that automatically adjusts the resistance to gas flow according to thermal variations. This ensures that the isoflurane concentration remains stable, even when the temperature of the incoming gases fluctuates. Thermal control is essential because volatile anesthetics like isoflurane have vapor pressures that can vary with ambient temperature, potentially affecting the delivered concentration. The vaporizer compensates for these variations, maintaining a constant anesthetic dose, thereby minimizing the risk of incorrect administration.

The Sigma Delta is also equipped with a pressure compensation system, ensuring stable delivery of anesthetic gases even when pressure fluctuations occur, such as during the use of intermittent positive pressure ventilation (IPPV). This feature is particularly important in clinical environments where respiratory equipment can create variable pressures in the gas system, potentially distorting the administered dose if not properly regulated.

Another aspect of the Sigma Delta's design is its ease of maintenance. The vaporizer is built to allow easy access to its internal systems for servicing and replacement of essential components, such as the wicks that ensure the gas is properly saturated with anesthetic. The isoflurane reservoir refill system also simplifies the process, with a keyed filler system that prevents refilling with the wrong anesthetic agent. A visible level indicator allows for easy monitoring of the remaining isoflurane, providing additional safety to avoid accidental stock depletion.

The performance of the Sigma Delta is regularly tested and calibrated to ensure optimal functioning throughout its use. It is critical that the vaporizer is maintained according to Penlon's recommendations, including regular leak tests, bypass resistance checks, and periodic calibration verification to ensure the delivered concentrations are within specifications. The vaporizer is designed to withstand regular use and demanding service conditions. If the vaporizer’s performance degrades, a full service may be necessary, involving revision of certain internal components or replacement of the wick or vapor control system.

The Sigma Delta is compatible with several mounting systems, including Selectatec, CageMount, and Dräger, offering great flexibility for use with different anesthetic machines. This vaporizer is engineered to meet the highest safety standards, ensuring that users can rely on the accurate and reliable delivery of isoflurane each time it is used. It is ideal for hospitals, veterinary clinics, and other healthcare facilities where anesthesia is regularly administered and where safety and precision are paramount. Thanks to its robust design, ease of maintenance, and its temperature and pressure compensation features, the Sigma Delta stands as a trusted choice for all healthcare professionals involved in the administration of volatile anesthetic agents.

• Flow rate range: 0.2 to 15 L/min
• Operating temperature range: 15 to 35°C
• Storage temperature range: -20 to 50°C
• Capacity: 250 ml max, 35 ml min
• Weight: 4.8 kg
• Dimensions: 133 x 219 x 158 mm (Cagemount)
• Compatibility: Selectatec, CageMount, Dräger, Interlock
• Filling system: Keyed Filler, Quik-Fil