Related Experiment Video
Updated: Feb 14, 2026
13:53
The Helsinki Rat Microsurgical Sidewall Aneurysm Model
Published on: October 12, 2014
12.7K
Factors predicting success after microsurgical vasovasostomy
Marco Cosentino1, Maria F Peraza2, Alvaro Vives2
1Andrology Department, Fundacio Puigvert, Universitat Autonoma de Barcelona, Carrer Cartagena 340-350, 08025, Barcelona, Spain. doccosentino@gmail.com.
International Urology and Nephrology
|February 10, 2018
Summary
Predicting vasovasostomy success is crucial for patient counseling. Microsurgical double-layer vasovasostomy success depends on factors like granuloma presence and obstruction severity, aiding in predicting surgical outcomes.
Area of Science:
- Urology
- Reproductive Medicine
- Surgical Outcomes
Background:
- Vasectomy reversal is a common procedure for men seeking to restore fertility.
- Microsurgical techniques have improved success rates in vasovasostomy.
- Predicting surgical success is essential for patient management and counseling.
Purpose of the Study:
- To identify factors predicting success in microsurgical double-layer vasovasostomy.
- To critically analyze the current status of this surgical technique.
- To develop a predictive model for vasovasostomy outcomes.
Main Methods:
- A cohort of 263 patients undergoing vasovasostomy between 1986 and 2010 was analyzed.
- A double-layer, microscope-assisted, tension-free anastomosis technique was employed.
- Multivariate logistic regression was used to identify predictive factors for success.
Main Results:
- Univariate or bilateral granuloma and lower Silber grades (I-III) were identified as predictors of higher success probability.
- The presence of granuloma increased the odds of success (OR 3.105).
- Lower obstruction severity (Silber grade I-III) significantly predicted success (OR 4.795).
Conclusions:
- While some factors predicting vasovasostomy success are known, others remain unidentified.
- A developed predictive model can easily estimate patency and success rates.
- The model provides valuable assistance for patient counseling regarding vasectomy reversal outcomes.
Related Concept Videos
02:17Ecological Succession
21.7K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
21.7K
02:27Predicting Molecular Geometry
46.2K
VSEPR Theory for Determination of Electron Pair Geometries
46.2K
01:03Prediction Intervals
3.4K
The interval estimate of any variable is known as the prediction interval. It helps decide if a point estimate is dependable.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
3.4K
02:16Transcription Factors
82.9K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.9K
01:13Sensitivity, Specificity, and Predicted Value
1.4K
In healthcare diagnostics, laboratory tests play a crucial role in identifying and diagnosing a wide range of medical conditions. However, interpreting test results is not always straightforward. An abnormal test result does not always confirm the presence of a disease, just as a normal result does not guarantee its absence. To assess the reliability of these diagnostic tools, healthcare practitioners rely on two key statistical indicators: sensitivity and specificity.
Sensitivity is the...
Sensitivity is the...
1.4K
01:07End Point Prediction: Gran Plot
1.3K
A Gran plot is used to predict the equivalence volume or endpoint of a potentiometric or acid-base titration without reaching the endpoint. Typically, titration data is collected as a function of the titrant's volume up to a point less than the equivalence volume and then transformed into a linear format. The straight line is extended to the x-axis, indicating the necessary titrant volume to achieve the equivalence point.
For potentiometric titration, the Gran plot is created by plotting...
For potentiometric titration, the Gran plot is created by plotting...
1.3K