Product Overview
The document outlines a standard for a pacing-making smooth tear-away access device, intended for venous access procedures such as venous puncture and the insertion of venous catheters, including pacemaker electrode leads. It emphasizes a secure locking mechanism to prevent dislodgement, a rounded tip to minimize tissue trauma, and an easy-to-use symmetrical tear-away design for effortless removal.

Specifications and Models
The document lists various models (YDGQ-6 to YDGQ-10) with detailed specifications including outer and inner diameters and effective lengths for components like dilators, tearable catheter sheaths, guidewires, and puncture needles.

Contraindications
No specific contraindications are identified, but the device is contraindicated for patients where interventional procedures are clinically inappropriate. Special caution is advised for patients with damaged or infected puncture sites, severe bleeding tendencies, and significant coagulation disorders.

Contact Information
The document provides contact details for Nanjing YDB Medical Technology Co., Ltd., including telephone, fax, and website information, along with the physical address in Nanjing City, Jiangsu, China.