Laparoscopic Mishra;s Knot
Mishra's Knot is a promising knot which is a secure Extracorporeal knot used in Laparoscopic Surgery. This knot can be used on any tubular structure up to 18mm in diameter. This knot has configuration 1:1:1:1:1. That is one hitch, one wind, one lock, second wind, second lock, third wind, and third lock.

Learn the technique of Mishra’s Knot, a highly secure extracorporeal knot widely used in laparoscopic surgery for safe tissue ligation and suturing. In this educational video by Dr. R. K. Mishra, viewers can understand the step-by-step method of creating and applying this knot effectively during minimal access procedures.

This surgical training video is presented by World Laparoscopy Hospital, focusing on practical laparoscopic skills, precision suturing techniques, and advanced surgical education for surgeons and gynecologists worldwide.

Mishra’s Knot is a highly reliable extracorporeal knotting technique widely used in laparoscopic surgery for secure ligation of tubular and vascular structures. Developed by renowned laparoscopic surgeon Dr. R. K. Mishra, this knot has gained global acceptance due to its combination of high knot security, loop stability, cost-effectiveness, and ease of learning. Over the years, it has become an important component of modern minimal access surgery training and clinical practice.

Introduction to Extracorporeal Knotting in Laparoscopy

Extracorporeal knotting refers to the technique of forming a knot outside the body and then advancing it into the abdominal cavity using a knot pusher. This method is particularly useful when intracorporeal suturing is technically difficult, time-consuming, or when operating in deep or narrow operative fields.

Mishra’s Knot represents an advanced modification of traditional sliding knots. It provides the strength of a surgeon’s knot combined with the smooth sliding mechanism of a slip knot, allowing precise tightening around target tissues.

Development and Clinical Importance

Mishra’s Knot was developed to address two major challenges in laparoscopic surgery:

• Need for secure ligation of structures such as cystic duct, appendix base, or vascular pedicles

• Need to reduce dependence on costly disposable devices like staplers or clips

Studies and clinical experience have shown that this knot provides excellent knot security and loop security, resisting slippage even under physiological load. It is considered one of the safest extracorporeal knots for laparoscopic procedures and can be used for tubular structures of significant diameter.

Principle and Configuration

Mishra’s Knot follows a characteristic configuration often remembered as 1:1:1:1:1:1:1, representing:

• One hitch

• One wind

• One lock

• Second wind

• Second lock

• Third wind

• Final lock

This structured configuration ensures smooth sliding during placement and strong locking once seated on tissue.

Step-by-Step Concept of Technique

Although variations exist, the basic principle includes:

1. Encircle the target structure with suture intracorporeally

2. Bring both ends of suture outside the port

3. Tie Mishra’s Knot extracorporeally

4. Mount knot on knot pusher

5. Advance knot smoothly into abdominal cavity

6. Seat knot securely over tissue

7. Add reinforcement knots if required

The sliding property allows controlled tightening while maintaining tissue safety.

Clinical Applications

Mishra’s Knot is versatile and can be used in multiple laparoscopic procedures such as:

• Laparoscopic appendectomy

• Laparoscopic cholecystectomy

• Hernia repair

• Gynecological laparoscopic surgeries

• Vascular and pedicle ligation

In appendectomy and cholecystectomy, it provides a secure and economical alternative to clips and staplers.

Advantages of Mishra’s Knot

1. High Security
Provides excellent resistance against knot slippage and maintains tight loop approximation.

2. Cost Effective
Reduces use of expensive disposable devices like endoloops, clips, and staplers.

3. Easy to Learn
Suitable for beginners and trainees in laparoscopic surgery.

4. Versatile Usage
Applicable to both free structures and continuous tubular structures.

5. Faster Execution
Reduces operative time when compared with complex intracorporeal suturing.

Limitations and Considerations

Despite its advantages, surgeons must ensure:

• Proper knot construction

• Adequate tension maintenance

• Controlled knot advancement

Improper technique may lead to knot loosening or tissue injury during excessive sliding.

Role in Surgical Training and Global Adoption

The technique has been widely taught to surgeons and gynecologists undergoing minimal access surgery training. Its simplicity and reproducibility have helped surgeons worldwide adopt clipless laparoscopic approaches, improving cost accessibility in developing healthcare systems.

Mishra’s Knot continues to be an essential skill in laparoscopic suturing curriculum and advanced minimal access surgery education programs.

Conclusion

Mishra’s Knot is a landmark contribution to laparoscopic surgery, offering a perfect balance between security, simplicity, and economy. As minimally invasive surgery continues to evolve, techniques like Mishra’s Knot play a vital role in improving surgical safety while making advanced laparoscopic procedures more accessible globally.