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Total Hip Arthroplasty
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For the soft tissue approach to a total hip arthroplasty, you need to cut and manipulate soft tissue to reach the joint space. The less trauma you can cause to that soft tissue, the less inflammation and faster recovery for your hip replacement surgery patient.
Our HARMONIC SYNERGY® Blades may offer real benefits in terms of soft tissue management while gaining access to the hip joint space. After the skin incision is made (usually with a steel scalpel), HARMONIC® Blades can cut and coagulate the soft tissue. Using ultrasonic energy, it operates at lower temperatures, thus reducing desiccation of the tissue and lateral thermal spread.* Because it applies energy parallel to the force, trauma is reduced, which in turn reduces the inflammation processes.† And because it coagulates as it cuts, sealing the small vessels as you go, it can reduce blood loss when compared to monopolar electrosurgery.‡
*In a comparative tissue cutting study using chicken breast, the HARMONIC® Combination Hook Blade (HK105) cut at a lower tissue temperature (average temperature of 128 F or 53.3 C) compared with the monopolar electrosurgery pencil (average temperature of 230 F or 110 C). The difference was significant (p < .001).1
†In a pre-clinical study, necropsy and histological evaluations indicated a significant reduction in acute inflammation for skeletal muscle wounds created by the HARMONIC Blade vs. monopolar electrosurgery at 3, 7, and 21 days post-op (p value = 0.011 for all post-operative periods).1 Per NIH, the definition of inflammation is "A response of redness, swelling, pain and a feeling of heat in certain areas that is meant to protect tissues affected by injury or disease." (http://ghr.nlm.nih.gov/glossary=inflammation)
‡In a vessel sealing comparison, the HARMONIC Combination Hook Blade (HK105) sealed more 1-2 mm vessels than electrosurgery. Study conducted in porcine mesentery. In a pre-clinical study, porcine mesentery was used to compare the number of 1-2 mm vessels coagulated while cutting. The HARMONIC Combination Hook Blade("HK105", power level = 5) was compared to steel scalpel and monopolar electrosurgery (power level = 40W blend 1). The steel scalpel sealed zero of 20 vessels (0%), electrosurgery sealed 3 of 70 vessels (4.3%), and HARMONIC® HK105 sealed 64 out of 68 vessels (94.1%). Statistical analysis indicated that HARMONIC® HK105 sealed significantly more vessels while cutting than either the steel scalpel or electrosurgery (p < .001).1
When it comes to precision, soft tissue management, and multi-functionality, no other surgical instruments can compare to HARMONIC® Blades for orthopedic hip replacement procedures.
The HARMONIC® Technology works by converting electric energy into the blade's longitudinal motion, which vibrates at 55,500 Hz.
- When the blade is applied to soft tissue, it causes cellular friction.
- This intracellular heat causes proteins to reshape and hydrogen bonds to break down, for a clean, efficient cut.
- The amino acids reform into a sticky coagulum that reliably seals small vessels – and it does it at a temperature well below 100 degrees Celsius.*
This yields a number of benefits:
- It causes less acute inflammation. Acute inflammation has been linked to increased perceptions of pain.†
- No electricity passes to or through your patient.
- The lower temperature of the mechanical energy reduces lateral thermal spread and desiccation of the soft tissue.*
- Trauma is reduced because energy is applied parallel to the applied force.1
- Blood loss is reduced because a HARMONIC Device coagulates as it cuts – up to 20x the vessel sealing of electrocautery.‡
* In a comparative tissue cutting study using chicken breast, the HARMONIC® Combination Hooked Blade (HK105) cut at a lower tissue temperature (average temperature of 128 F or 53.3 C) compared with the monopolar electrosurgery pencil (average temperature of 230 F or 110 C). The difference was significant (p < .001).1
† In a pre-clinical study, necropsy and histological evaluations indicated a significant reduction in acute inflammation for skeletal muscle wounds created by the HARMONIC Blade vs. monopolar electrosurgery at 3, 7, and 21 days post-op (p value = 0.011 for all post-operative periods). Per NIH, the definition of inflammation is "A response of redness, swelling, pain and a feeling of heat in certain areas that is meant to protect tissues affected by injury or disease." (http://ghr.nlm.nih.gov/glossary=inflammation)
‡ In a vessel sealing comparison, the HARMONIC Combination Hook Blade (HK105) sealed more 1-2 mm vessels than electrosurgery. Study conducted in porcine mesentery. In a pre-clinical study, porcine mesentery was used to compare the number of 1-2 mm vessels coagulated while cutting. The HARMONIC Combination Hook Blade ("HK105", power level = 5) was compared to steel scalpel and monopolar electrosurgery (power level = 40W blend 1). The steel scalpel sealed zero of 20 vessels (0%), electrosurgery sealed 3 of 70 vessels (4.3%), and HARMONIC® HK105 sealed 64 out of 68 vessels (94.1%). Statistical analysis indicated that HARMONIC® HK105 sealed significantly more vessels while cutting than either the steel scalpel or electrosurgery (p < .001).1
