there are several types of endoscopic electric knives commonly used in minimally invasive surgeries. These knives are designed to cut, coagulate, and dissect tissues during endoscopic procedures. Please note that medical technology is constantly evolving, and new devices may have been introduced since then. Here are some common types of endoscopic electric knives:
Monopolar Electrosurgical Knife: This type of electric knife uses monopolar energy to cut tissue. It consists of an active electrode at the tip of the knife and a return electrode (grounding pad) placed elsewhere on the patient's body. The electric current flows from the active electrode through the tissue to the return electrode, allowing precise cutting and coagulation.
Bipolar Electrosurgical Knife: Unlike monopolar knives, bipolar electrosurgical knives have both the active and return electrodes located at the tip of the device. The electric current flows only between these two electrodes, reducing the risk of unintended damage to surrounding tissues. Bipolar knives are often used for delicate procedures where precise coagulation is required.
Ultrasonic Endoscopic Knife (Ultrasonic Scalpel): This knife uses ultrasonic vibrations to cut and coagulate tissues. It works by transmitting ultrasonic energy through the blade, which converts into mechanical energy, effectively dissecting the tissue. The blade's movement also facilitates coagulation of blood vessels as it cuts.
Argon Plasma Coagulation (APC) Knife: While not a traditional knife, the APC system is used in conjunction with endoscopes for coagulation purposes. It delivers ionized argon gas through a probe, which is activated electrically. When directed at bleeding tissue, the argon gas coagulates the tissue, controlling bleeding during endoscopic procedures.
Ligasure: Ligasure is an advanced vessel-sealing technology that uses a combination of pressure and radiofrequency energy to seal blood vessels during surgery. It is commonly used in laparoscopic and endoscopic procedures to achieve reliable hemostasis.
Harmonic Scalpel: The harmonic scalpel is another advanced technology that uses ultrasonic vibrations to cut and coagulate tissues. It operates at a lower temperature compared to traditional electrosurgical devices, reducing the risk of thermal damage to nearby tissues.
Cautery: Cautery devices use heated tips to coagulate tissue and control bleeding during surgery. Endoscopic cautery devices are often used in various procedures, especially those involving the digestive tract.
These electric knives and energy-based devices have revolutionized minimally invasive surgery, allowing surgeons to perform precise and efficient procedures with reduced bleeding and faster patient recovery. However, the specific use of each device depends on the surgical procedure and the surgeon's preference. Always consult with a medical professional for the most up-to-date information on medical devices and technologies.