Veress needle

Veress Needle

The Veress needle is a medical instrument commonly used in laparoscopic surgery. It is named after the Hungarian gynecologist, Dr. János Veress, who invented it in the 1930s. The Veress needle is an essential tool in creating a pneumoperitoneum, which is the inflation of the abdominal cavity with carbon dioxide gas to create a working space for laparoscopic procedures.

Design and Function

The Veress needle consists of a long, slender, hollow metal tube with a sharp, pointed tip. It is typically made of stainless steel or titanium. The needle is attached to a handle that allows the surgeon to control its insertion and movement. At the proximal end of the needle, there is a valve mechanism that regulates the flow of gas.

During laparoscopic surgery, the Veress needle is inserted into the abdominal cavity through a small incision or a puncture made in the abdominal wall. The needle is inserted at an angle, and as it penetrates the layers of tissue, the surgeon can feel a series of "pops" or resistance, indicating the passage through different layers. Once the needle is properly positioned, the valve is opened, and carbon dioxide gas is slowly injected into the abdominal cavity.

Advantages and Uses

The Veress needle is widely used in laparoscopic surgery due to its several advantages. Firstly, it allows for a safe and controlled entry into the abdominal cavity, minimizing the risk of injury to surrounding organs and blood vessels. Secondly, the needle's design helps prevent gas leakage during insufflation, ensuring a stable pneumoperitoneum throughout the procedure. Lastly, the Veress needle is relatively inexpensive compared to other trocars used in laparoscopic surgery.

The Veress needle is primarily used in laparoscopic procedures such as cholecystectomy (gallbladder removal), appendectomy (appendix removal), and various gynecological surgeries. It is also used in diagnostic laparoscopy to visualize and evaluate the abdominal organs.

Safety Considerations

While the Veress needle is generally considered safe, there are potential risks associated with its use. Improper insertion or excessive force can lead to injury to organs such as the bowel, blood vessels, or bladder. To minimize these risks, surgeons must exercise caution and ensure proper training in the use of the Veress needle.

Conclusion

The Veress needle is a crucial instrument in laparoscopic surgery, allowing for safe and controlled entry into the abdominal cavity. Its design and function make it an essential tool in creating a pneumoperitoneum, enabling surgeons to perform minimally invasive procedures with precision. Despite its potential risks, when used correctly, the Veress needle contributes to the success and safety of laparoscopic surgeries.

See Also

• Laparoscopic Surgery
• Pneumoperitoneum
• Trocar