Quantitative Characterization of Safe Irrigation for Ventricular Shunt Catheters

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

4 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-04-01

Study Completion Date

2016-06-14

Brief Summary

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The objective of this pilot study is to perform a set of pressure and flow rate measurements in order to quantitatively characterize safe irrigation or "flushing" of a ventricular shunt catheter, a routine maneuver performed by a neurosurgeon during a shunt revision surgery. This maneuver involves injecting saline with a syringe to clear plugged shunt catheters. Based on data obtained in Stage I of the study, a device has been fabricated which provides the same small-volume pulse of fluid used by surgeons. In Stage II of the study, pressure and flow rate measurements generated by this specialized flusher device will be collected and measured.

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Detailed Description

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Primary Objective: To collect pressure and flow rate measurements during shunt revision surgeries in human patients.

Pressure recordings of the injected fluid will be obtained using disposable off-the-shelf sterile pressure transducers (which are typically used for intracranial and arterial pressures monitoring) readily available in the operating room. First, the surgeon will attempt to flush the catheter using the Alcyone in-line Flusher device. If this fails, the surgeon may elect to attempt to flush using a standard syringe attached to the catheter. The flow rates will be measured by video, recording the syringe during the flushing maneuver, and then extracting plunger motion information by applying image processing on the acquired videos. In the event the recording equipment is not available (in that these operations are usually unscheduled and sometimes urgent), the same irrigation techniques may be used without the pressure recordings.

Secondary Objective: To analyze the collected data and establish maximal allowable injection pressure and flow rate. The collected data segments for each patient will be analyzed and maximal values for pressure and the saline injection rate will be recorded in a spreadsheet. Inter-patient variation in the results, presumably due to different degrees of occlusion, will be statistically evaluated. We will also determine if any of the catheters which appear occluded in the operating room resume flow with the flushing maneuvers.

Conditions

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Hydrocephaly

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Drainage with Alivio in-line Flusher

Volume of saline needed to drain CSF using the Alivio in-line Flusher historically compared with volume of saline needed to drain CSF using a standard syringe

Group Type EXPERIMENTAL

Cerebrospinal Fluid (CSF) Drainage

Intervention Type DEVICE

Placement of Alivio in line flusher during CSF drainage

Interventions

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Cerebrospinal Fluid (CSF) Drainage

Placement of Alivio in line flusher during CSF drainage

Intervention Type DEVICE

Other Intervention Names

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Alivio in line flusher

Eligibility Criteria

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Inclusion Criteria

1. Subjects must be 30 days to 35 years of age, of any race or gender.
2. Subjects must be scheduled to undergo a neurosurgical procedure potentially requiring a revision of neurosurgical catheters.
3. Subjects aged \>18 years of age must be willing and able to provide written informed consent. Parental consent will be required for minors.

Exclusion Criteria

1. Inability or unwillingness of subject or parent/guardian to give informed consent/assent.
2. Judgment of the investigator, surgeon, or any member of the care team (including anesthesiology or operating room nursing staff) that participation in the study will interfere with, or be detrimental to, administration of optimal healthcare of the subject.
3. Inability or unwillingness of subject to endure the test or any other condition that would preclude or bias the results of the study according to the judgment of the investigator.

Minimum Eligible Age

30 Days

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No