Myocardial biopsy drill: construction details and techniques.

Area of Science:

• Cardiovascular Research
• Surgical Innovation
• Biomedical Engineering

Background:

• Myocardial biopsy is crucial for diagnosing cardiac conditions.
• Existing biopsy techniques may have limitations in sample quality or efficiency.
• Novel methods are needed to improve myocardial tissue acquisition.

Purpose of the Study:

• To describe the modification of dental equipment into a functional myocardial biopsy drill.
• To evaluate the efficacy and safety of this novel drill in an animal model.
• To assess the quality of myocardial samples obtained and their suitability for biochemical analysis.

Main Methods:

• Dental equipment was adapted to create a myocardial biopsy drill following Poole et al.'s technique.
• The drill was used in canine subjects to obtain full-thickness myocardial cores (3 mm diameter, 40-70 mg).
• A positive/negative pressure system was employed for blood separation and rapid sample freezing.

Main Results:

• The modified drill consistently yielded 5-7 myocardial cores per dog.
• No adverse effects on left ventricular function were observed post-biopsy.
• Myocardial ATP levels were measured at 32.12 +/- 0.90 nmole/mg protein using a modified Estabrook et al. assay.

Conclusions:

• Modified dental equipment provides a viable method for myocardial biopsy in dogs.
• The technique ensures high-quality tissue samples suitable for biochemical analysis.
• This approach offers a potentially cost-effective and efficient alternative for myocardial tissue acquisition.