Its main advantages include precise dissection, reliable hemostasis, less lateral thermal spread and charring mainly works by applying pressure and then sealing with a denatured protein coagulum while applying ultrasonic vibration to denature hydrogen bonds perform vessel coagulation [2].
What is a Harmonic scalpel used for?
THE HARMONIC scalpel is a new device that has been introduced to surgery during the last decade. It is a device that uses high-frequency mechanical energy to cut and coagulate tissues at the same time . Laparoscopists were the first ones to use this method widely.
What is the difference between LigaSure and Harmonic scalpel?
In contrast, the Harmonic scalpel uses ultrasound technology to denature proteins in vessel walls and tissues up to 5mm thick leading to coagulation [16]. Unlike the LigaSure, the Harmonic scalpel is also able to cut through tissue as it coagulates .
How does Harmonic ACE work?
An advanced ultrasonic algorithm provides the HARMONIC ACE®+7 Shears with the ability to seal vessels up to and including 7 mm in diameter. The system actively monitors the conditions of the tissue within the jaws of the device and responds intelligently to changes in patient tissue conditions.
How does ultrasonic scalpel work?
The active blade of an ultrasonic scalpel vibrates 55,500 times per second, producing frictional heat in contact with the tissues . As a result of this frictional heat, the protein in the tissues is denatured into an adhesive material called coagulum to seal the vessel.
How does a harmonic work?
When a string is only lightly pressed by one finger (that is, isolating overtones of the open string), the resulting harmonics are called natural harmonics. ... This technique, like natural harmonics, works by canceling out the fundamental tone and one or more partial tones by deadening their modes of vibration .
What type of energy does LigaSure use?
LigaSure vessel sealing technology works by applying a precise amount of bipolar energy and pressure to fuse the collagen and elastin in the vessel walls. It effectively seals vessels 1 to 7 mm in diameter with minimal sticking, charring, or thermal spread.
How much does a LigaSure cost?
At a retail price of $925 , the LigaSure Advance is expensive relative to its competitors.
Is Harmonic bipolar?
Harmonic scalpel uses ultrasound technology to coagulate and to cut tissues. Small Jaw device uses bipolar electrical energy and pressure to form a seal and a micro blade to divide the sealed tissues.
How does the harmonic scalpel work?
A harmonic scalpel cuts via vibration . The scalpel surface itself cuts through tissue by vibrating in the range of 55,500 Hz. The high frequency vibration of tissue molecules generates stress and friction in tissue, which generates heat and causes protein denaturation.
What are the benefits of harmonic technology?
HARMONIC devices use ultrasonic energy to simultaneously cut and coagulate soft tissue and vessels at much lower temperatures than RF-based devices, resulting in minimal thermal damage to the surrounding tissue.
What is Harmonic Ace?
HARMONIC ACE+ Shears can be used for coagulation and transection of vessels up to 5 mm and handle multiple surgical jobs with precision including dissection, sealing, transection, and otomy creation. The refined blade design includes a tapered tip with a proprietary, nonstick coating.
What is harmonic focus?
Aim: Harmonic Focus (HF) is an ultrasonic device developed most recently for thyroid surgery . ... Results: When compared to conventional haemostasis, a reduction was observed in the duration of surgery in the HF group, and the amount of blood loss was reduced by 29%, and 46%, respectively.
How does a laser scalpel work?
Radiated laser energy penetrates the tissue as an incision is made , thereby inducing an efficient blood flow stasis which is amplified by thermal energy diffusing from the immediate surroundings of the scalpel tip.
What is a scalpel made of?
Scalpel blades are usually made of hardened and tempered steel, stainless steel, or high carbon steel ; in addition, titanium, ceramic, diamond and even obsidian knives are not uncommon.
What is a bipolar cautery?
n. Cauterization using a high frequency electrical current passed through tissue from one electrode to another .
