The New Versatile & Innovative

Compact Schley Model II Instrument
Improvements in techniques and equipment design make this procedure easier to learn and use. A high rate of success and queen performance levels similar to naturally mated queens can be consistently attained.

There are a variety of instruments available, which range in cost, quality and ease of use. The choice can make a difference in the success or frustration of using this procedure.
The new compact Model II and Standard Schley Instruments
The technique is delicate and requires precision and accuracy in fine movements. High repeatability and a wide range of movement are also important features. Research findings that reveal new details about the natural mating process have been incorporated into the insemination process. Consequently, today the technique is easier to learn and perform with consistency. Precision machining combined with the features and options of the Schley instrument designs provide effective and efficient tools for controlled mating.
The new compact Schley Model II stands out in providing versatility in techniques, adjustments and positioning, offering impressive versatility and creative new options As new findings on the natural mating process are revealed, Prof. Peter Schley strives to simulate this, upgrading and improving techniques and instrumentation. In 25 years of insemination equipment design, his continuous modifications and upgrades are an on-going process to perfect the procedure and equipment. Known for perfection in machining, precision control of very fine movements, the micromanipulators provide ease of handling and high repeatability of the procedure. The wide range of movement and flexibility in adjustments stand out as unique and valued features.
This new model II allows the beginner to try various techniques, discover their personal preferences and gain efficiency and accuracy with the options this allows. The procedure is easier to learn and use with these improvements and innovations.

The new Schley Model II instrument is easily adjustable for both right and left hand users. This can be used in the standard position or turned 90° for use in a frontal angle. The queen can also be rotated 180° for orientation similar to natural mating. The individual, varied and changing preferences of users are well accommodated with this new instrument.
The compact, new size of the Model II allows a wide range of microscopes types to be used. This also eliminates any interference with microscope knobs that sometimes restricted the range of syringe movement in the standard model. The new instrument fits on the base plate of most microscope stands, rather then over the plate as the standard model.

The Model II has a flatter and narrower base and is shorter in height. The outside dimensions are 25 mm in height, 56 mm width and 155 mm in length, as compared to the standard 40 mm X 66 mm X 250 mm instrument. Increased stability of the shorter base is provided by crosswise extension of the feet.

The basic functionality of the components of the Schley instrument have not changed. The new instrument can be handled in the same manner as the standard instrument, with the additional new options. The proven standard model, with the larger and heavier base, is still available.

Innovations for the Left-Handed User

The Model II instrument, placed at the 90° positioning, provides convenience and ease of use by both right and left-handers. The hook holding block can be attached on either side of the instrument as pictured here. The attachment screw for the syringe holder is also exchanged between sides. The double adjusting knob for syringe positioning is accessible from either side.

The short support post, originally located to the left of the standard instrument, is now in the new frontal position. The view of the inseminator is in harmony with the direction of the queen holder and syringe, which makes orientation easier.

Choice Of Various Sting Hooks And Forceps

Various types of hooks and forceps can be used to open the queen’s vaginal chamber. The sting structure is lifted upward, stretching the tissue to more easily bypass the valve fold and deliver semen directly into the oviduct.
These new options are largely determined by personal preference and based upon positioning in a more natural manner. The perforated sting hook has principally replaced the standard flared hook. The use of a hand held pair forceps to lift the sting is now becoming a popular technique. To eliminate the awkwardness of handling a pair of forceps behind the instrument, Schley has designed the pressure grip forceps. For ease of use these are mounted on a standard handle and fit into the hook holder assembly.
Compact Model II-Left, configured for the lefthanded user.
Compact Model II, configured for the righthanded user.

Optional Manipulation With Two or Three Hooks

The flexibility in instrument adjustments offers new choices in the use of hooks and forceps. The inseminator can use the standard set of hooks, or the ventral hook with pressure forceps grip. In addition, 3 manipulators can be used, two ventral hooks and the pressure grip forceps. Using this technique, the vaginal chamber is opened with two ventral hooks and the sting manipulated with a third hook or forceps mounted at 90°. For the beginner, just learning the technique, this can be an advantage as free-hand movements are eliminated.

Free-hand work is also possible. The inseminator can use a ventral hook and a pair of hand held forceps to lift the sting. For this technique, one of the holding blocks can be removed. The forceps pressure grip can also be used in this manner. The versatility of this instrument allows the inseminator to explore a variety of techniques, and the beginner to progress into an experienced operator.
The New CO2 Flow Rate Adapter

Another innovation is the Schley CO2 Flow Rate Adapter. CO2 is used to anesthetize the queen during the insemination procedure. This devise acts as a pressure valve to regulates the flow rate delivered to the queen, preventing overdosing and irregular flow. The need to determine the flow rate by peculating gas in a water filled flask or use of a flow meter is eliminated.
The adapter contains 2 colored balls for adjustment. For a low and even CO2 rate, gas is release as necessary until both balls rise up to the top. The flow is then reduced so that the blue ball falls and the green ball remains at the top. In this position the correct flow is delivered.
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