Embryo transfer tube

By designing a first tube segment with an adapted inner diameter, and incorporating a degreased cotton block and a ring-shaped limiting seat, the problem of embryos being easily damaged or lost in existing Pasteur pipettes has been solved, achieving precise operation and efficient transfer.

CN224450678UActive Publication Date: 2026-07-03SICHUAN ACADEMY OF MEDICAL SCI SICHUAN PROVINCIAL PEOPLES HOSPITAL
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Patent Information

Application Number
CN202521104192.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-30
Publication Date
2026-07-03
Estimated Expiration
2035-05-30

AI Technical Summary

Technical Problem

When using existing Pasteur pipettes to extract embryos on-site, the embryos can easily pass through the narrow suction section into the thicker connecting section, leading to embryo damage or loss.

Method used

Design an embryo transfer tube, including a first tube segment and a second tube segment that are connected to each other. The second tube segment is equipped with a degreased cotton block and an annular limiting seat. The annular limiting seat reduces the air intake cross-sectional area and increases airflow resistance. The inner diameter of the first tube segment is adapted to the embryo. The transition section has a conical structure to facilitate embryo reflux.

Benefits of technology

By precisely controlling the location of embryo aspiration, the probability of accidental aspiration into the second tubing segment is reduced, the embryo is protected, fluid flow is prevented, the success rate of the procedure is improved, and the adverse effects of alcohol-induced embryonic contraction are avoided.

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Abstract

The utility model relates to the technical field of assisted reproduction, in particular to an embryo transfer tube which comprises a first tube section and a second tube section which are communicated with each other, the inner diameter of the second tube section is larger than that of the first tube section, a degreasing cotton block is arranged in the second tube section, and an annular limiting seat is arranged on the inner wall of one end, far away from the first tube section, of the second tube section. And the inner diameter of the annular limiting seat is smaller than that of the second pipe section. The annular limiting seat is arranged at the tail end of the second pipe section with the large diameter, so that the air inlet sectional area can be reduced, airflow resistance can be increased, negative pressure generated by a suction ball is smoother, an operator can accurately control the suction position of an embryo conveniently, and therefore the situation that the embryo is sucked into the second pipe section by mistake is reduced; and the embryo and liquid which may be aspirated by mistake are further intercepted.
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