Comparison of 2 Different Flow Rates During Oocyte Retrieval
Study Details
Study Description
Brief Summary
The purpose of this study is to evaluate the effect of different flow rates during oocyte retrieval, on the number of cumulus oocyte complexes (COCs) retrieved.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
In the current study, each ovary will be randomly allocated to oocyte retrieval using 0.42 ml/sec or 0.62 ml/sec flow rate.
The primary endpoint will be the number of oocytes retrieved, while secondary outcomes will include oocyte recovery rate (number of oocytes retrieved per follicle aspirated), number of mature oocytes, maturation rate (number of mature oocytes/number of oocytes retrieved), mean oocyte score (by evaluating oocyte shape and size, ooplasm characteristics, structure of perivitelline space (PVS), structure of zona pellucida (ZP) and polar body (PB) morphology), fertilization rate (number of fertilized oocytes/number of mature oocytes), number of blastocysts and blastulation rate (number of blastocysts/number of 2PN).
Patients aged <43 years with the presence of at least 3 follicles ≥ 11mm in each ovary on the day of oocyte retrieval will be eligible for inclusion in the study.
Prior to oocyte retrieval in eligible patients their left and right ovary will be randomly allocated into the 0.42 ml/sec or 0.62 ml/sec flow rate group. Randomisation with minimisation will be employed.
The specific flow rates will be achieved by adjusting the aspiration pressure of the vacuum pump accordingly. A study nurse will be responsible for adjusting the aspiration pressure of the vacuum pump depending on randomization. The doctor performing the oocyte retrieval will not be aware of the flow rate used in each ovary.
All follicles will be aspirated and then flushed if needed up to a maximum of 5 times with an open flushing technique, using a 17G double-lumen needle.
Data will be registered regarding the number of flushes required to retrieve a COC, the morphology of oocytes after denudation, oocyte fertilisation and embryo development up to the blastocyst stage.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Low aspiration flow rate All follicles will be aspirated with the addition of follicular flushing if necessary with an aspiration flow rate of 0.42ml/sec. |
Procedure: Oocyte retrieval with low aspiration flow rate
All follicles will be aspirated with the addition of follicular flushing if necessary (up to 5 times per follicle) with an aspiration flow rate of 0.42 ml/sec.
|
| Experimental: High aspiration flow rate All follicles will be aspirated with the addition of follicular flushing if necessary with an aspiration flow rate of 0.62ml/sec. |
Procedure: Oocyte retrieval with high aspiration flow rate
High aspiration flow rate All follicles will be aspirated with the addition of follicular flushing if necessary (up to 5 times per follicle) with an aspiration flow rate of 0.62 ml/sec.
|
Outcome Measures
Primary Outcome Measures
- Number of oocytes retrieved [During oocyte retrieval]
Number of oocytes retrieved per ovary randomised.
Secondary Outcome Measures
- Oocyte recovery rate [During oocyte retrieval]
Number of oocytes retrieved per follicle aspirated.
- Oocyte maturation rate [2-3 hours post oocyte retrieval]
Number of mature (metaphase-II) oocytes divided by the number of oocytes retrieved per ovary randomised.
- Average oocyte score [2-3 hours post oocyte retrieval]
Average oocyte score based on the evaluation of oocyte shape and size, ooplasm characteristics, structure of perivitelline space, structure of zona pellucida and polar body morphology.
- Fertilization rate [Day 1 post oocyte retrieval]
Number of fertilised (2PN) oocytes divided by the number of matured oocytes retrieved per ovary randomised.
- Percentage of good quality blastocysts on day 5 [5 days post oocyte retrieval]
Number of good quality blastocysts divided by the number of fertilized oocytes per ovary randomised.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
Presence of both ovaries
-
18-43 years old
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At least two follicles >14mm present in each ovary on day of triggering final oocyte maturation.
Exclusion Criteria:
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One or no ovaries present
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Monofollicular development
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Poor responders
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Previous history of hemorrhage during oocyte retrieval
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Eugonia Unit of Assisted Reproduction | Athens | Greece | 11528 |
Sponsors and Collaborators
- Eugonia
- Aristotle University Of Thessaloniki
Investigators
- Principal Investigator: George T Lainas, PhD, Eugonia ART Unit
Study Documents (Full-Text)
None provided.More Information
Publications
- Flow rate for oocyte retrieval