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Visual inspection: during the investigation, no significant deformations or damage of the progav 2.0 was determined.Permeability test: a permeability test has indicated that the valve has a blockage.The reservoir was permeable after separation of components.Computer controlled test: to investigate the claim of under-drainage, the opening pressure is measured using a miethke computer controlled testing apparatus which simulates a cerebrospinal fluid flow.The valve is tested in the horizontal position.Because the valve is not permeable, a computer controlled test is not possible.Adjustment test: the progav 2.0 was tested and is not adjustable.Braking force and brake function test: the brake functionality test has shown that the brake function is operational, however the braking force cannot be measured due to the non-adjustability of the valve.Internal inspection : after dismantling of the valve, deposits were found in.Result : in advance, we would like to point out that the product was not submerged in liquid at the time of return.Therefore, a meaningful analysis with conclusive results is not possible.Returning products in a dry condition can lead to a change in the product, which can have a negative impact on functionality.Nevertheless, we examined the product.Based on the investigation results, it was determined that the progav 2.0 was not adjustable and clogged.The visible dried deposits could have led to the functional deviations.Deposits caused by substances naturally present in the patient's body, such as protein, blood or tissue particles, are among the known and unavoidable risks and side effects of hydrocephalus therapy.Even small amounts of organic material can affect the integrity of the valve.The examination of the return has been completed with the drafting of this report.
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