SPHERA MECHANISM
Precise performance
The pressure control system is encased in the input connector. The mechanism is composed of ruby ball, stainless steel spring and conic seat. The perfect match between ball and seat can safely set the opening and closing pressure of the system, providing precise control of intracranial pressure. The valve is provided in four pressure ranges: high, medium, low and extra low to meet individual needs of patients. The input connector, manufactured in polysulfone, has radiopaque markings of flow and pressure that allows viewing in x-ray image.
ANTI-SIPHON NECHANISM
Avoiding overdrainage
Encased in the output connector, the mechanism prevents ventricular overdrainage caused by siphoning in the distal catheter when the patient moves from horizontal to vertical position. The mechanism is composed of a flexible silicone membrane that when attracted by the negative pressure of the distal catheter prevents or reduces the flow of excessive fluid (fig.2).When the patient is upright, the combination of the mechanisms Anti-siphon and Sphera provides the dynamic balance of the system, keeping the valve operating on a stable flow/pressure rate. When the patient returns to the horizontal position, the Anti-siphon system stops to interfere in the control of flow and the valve returns to work in the initial condition (Fig.1).
CATHETERS
Flexibility and radiopacity
The valve is supplied with a cerebral ventricular catheter and a peritoneal catheter. These are made of soft transparent medical grade silicone with radiopaque fillet, which allows the viewing of catheters in x-ray image. The hardness of the silicone used in the manufacture of catheters was tailored to allow adequate flexibility and at the same time to prevent the occurrence of unwanted kink in the subcutaneous route, which can cause obstruction or decrease of drainage flow. The standard model comes with a straight ventricular catheter a 15 or 23.5cm length, a 90° Angle former, and the peritoneal catheter with 102 or 120cm length. Different configurations are avaliable upon request.
PRESSURE AND FLOW
The bands in Graphic 1 and 2 represent the range where the pressure curve operates when submitted to a progressive increasing flow from 5 to 50ml/hour. There results were obtained in “in vitro” tests.
The graphic represents a valve operating within a range of medium pressure (7 to 11 cm H2O), initially with the patient in a horizontal position and then upright.
COMPONENTS
- 1 – Input Connector
- 2 – Body in silicone
- 3 – Chamber for pumping and puncturing
- 4 – Radiopaque markers for pressure and flow direction
- 5 – Pressure control valve (ball, seat and spring)
- 6 – Safe guard in Polysulfona
- 7 – Anti -siphon mechanism
- 8 – Output Connector
Marks
Radiopaque marking to indicate the pressure flow
DIMENSIONS
Adult
Code
- ADE10210
- ADB10210
- ADM10210
- ADA10210
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right-angled 10cm with inox stylet;
- 01 Peritoneal catheter 102cm;
- 01 Burr hole catheter support
Code
- ADE10215
- ADB10215
- ADM10215
- ADA10215
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right-angled 15cm with inox stylet;
- 01 Peritoneal catheter 102cm;
- 01 Right-angled guide, 01 Burr hole catheter support;
Code
- ADE10223
- ADB10223
- ADM10223
- ADA10223
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right-angled 23,5cm with inox stylet;
- 01 Cateter peritoneal de 102cm;
- 01 Right-angled guide; 01 Burr hole catheter support
Code
- ADE12015
- ADB12015
- ADM12015
- ADA12015
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right 15cm with inox stylet;
- 01 Peritoneal catheter 120cm;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- ADE12023
- ADB12023
- ADM12023
- ADA12023
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right 23,5cm with inox stylet;
- 01 Peritoneal catheter 120cm;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- ADE9010
- ADB9010
- ADM9010
- ADA9010
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right-angled 10cm with inox stylet;
- 01 Peritoneal catheter 90cm;
- 01 Burr hole catheter support
Code
- ADE9015
- ADB9015
- ADM9015
- ADA9015
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 01 Cerebral ventricular catheter right 15cm with inox stylet
- 01 Peritoneal catheter 120cm
- 01 Right-angled guide, 01 Burr hole catheter support
Adult Unishunt
Code
- UADE10210
- UADB10210
- UADM10210
- UADA10210
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Cerebral ventricular catheter right-angled 10cm with inox stylet;
- 01 Peritoneal catheter 90cm;
- 01 Burr hole catheter support
Code
- UADE10215
- UADB10215
- UADM10215
- UADA10215
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to;
- 01 Peritoneal catheter 102cm;
- 01 Cerebral ventricular catheter right 15cm with inox stylet;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- UADE10223
- UADB10223
- UADM10223
- UADA10223
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Peritoneal catheter 102cm;
- 01 Cerebral ventricular catheter right 23,5cm with inox stylet;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- UADE12015
- UADB12015
- UADM12015
- UADA12015
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to;
- 01 Peritoneal catheter 120cm;
- 01 Cerebral ventricular catheter right 15cm with inox stylet;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- UADE12023
- UADB12023
- UADM12023
- UADA12023
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Peritoneal catheter 120cm;
- 01 Right-angled guide, 01 Burr hole catheter support
Code
- UADE9010
- UADB9010
- UADM9010
- UADA9010
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Cerebral ventricular catheter right 10cm with inox stylet;
- 01 Cateter peritoneal de 90cm
- 01 Burr hole catheter support
Code
- UADE9015
- UADB9015
- UADM9015
- UADA9015
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Peritoneal catheter 90cm ;
- 01 Cerebral ventricular catheter right 15cm with inox stylet;
- 01 Right-angled guide, 01 Burr hole catheter support
Adult Unitized
Code
- UNADE10213
- UNADB10213
- UNADM10213
- UNADA10213
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve pre-coupled to
- 01 Cerebral ventricular catheter right 13,5cm with inox stylet
- 01 Peritoneal catheter 102cm;
- 01 Right-angled guide, 01 Burr hole catheter support, 01 stainless steel guide
Single Valve
Code
- SVAE
- SVAB
- SVAM
- SVAA
Pressure
- Extra-Low
- Low
- Medium
- Hight
Content
- 01 Adult hydrocephalus valve;
- 1 Burr hole catheter support
Radiopacity
Implanted valve identification
The pressure and flow direction of the valve are detectable by X-ray picture, as shown next. The arrow on the valve body indicates the direction of flow, and the circular marks symbolize according to legend pressure.
Images scanned directly from real patient Implants X-ray