There are two seperate variables: the angle of the needle in the holder, and the location on the needle grasped by the holder. This needle can be perpendicular, acute, parallel or obtuse to the holder's axis. If a needle is located perpendicular to the needle holder, the needle can be driven through tissue by merely rotating the holder on its axis; this manipulation that gives no added on space. If, instead the needle is put at an oblique or obtuse angle next to the needle holder, If you want the needle to move forward through the tissue, then the handles must follow a wide arc through the curve. Regrettably, in difficult access areas where temptation arises to use a non-perpendicular needle attitude to direct the needle, there is less space to move the needle holder handles through the necessary arc. In most cases, Its so much more easy to use a perpendicular needle to the correct way than having to struggle with maneuvering the needle handles into a wide arc to power an acute or obtuse angle through the tissue. A few instances happen when placing a the needle through the tissue. Some situations occur where there is an advantage by putting the needle at an acute or obtuse angle to the needle holder. The more professionol the surgeon is with there surgical instruments, the less his need for curved needle holders & weird needle positions.
A differnet way of the needle is the plane of it curved parallel to the handle, "hooking" down in a deep wound you must sew layers parallel to the surface. Doing it like this gives ease to the point and requires a quick moving back & forth for the needle through the tissue. Such a maneuver uses very minimal or no space in handle manipulation, in comparasion to oblique attitudes.
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