Stranded Seeds in Braided Monofilament Suture

IsoStrand® is designed to provide optimal fixation within prostate tissue.

The IsoStrand® Cutting Fixture is helpful to perform manual strand cutting under radiation protection.

I-125 Seed Chain

The IsoStrand® seed chain consists of 10 IsoSeeds with standard seed-spacer configuration and a 1.0 cm center-to-center spacing. It can accomodate either IsoSeed® I25.S06 or IsoSeed® I25.S17plus.


Excellent Visibility

IsoStrand® is available with either I25.S06 or I25.S17plus source model designs. Both seed types are visible under X-ray, fluoroscopy, CT and MR, and additionally show excellent ultrasound visibility.

  • „„IsoSeed® I25.S17plus features a full silver marker and has been designed for excellent visibility under X-ray/fluoroscopic imaging. In addition, it enables MR imaging and opens new perspectives for postoperative planning.
  • „„IsoSeed® I25.S06 contains a thin gold marker within a ceramic carrier, diminishing artifacts and providing optimal visibility in CT Imaging.


Low Migration Rates

One advantage of strands is their low migration rate. IsoStrand® is specially designed to reduce the migration rates still further. IsoStrand® consists of seeds and unique hourglass-shaped spacers which are embedded in a braided monofilament suture. This special design enables optimal fixation within prostate tissue and helps to reduce seed migration.



For additional information, please see:
Fact sheet IsoStrand® (EN)

Short Delivery Time

Our optimized production processes and intelligent stock management, with facilities centrally located in Europe, ensure fast and reliable delivery times. IsoStrand® can generally be delivered within one week, allowing flexible patient scheduling.


The activity of IsoStrand® can very quickly and easily be measured. This is of particular importance for clinics assaying 100% of seeds.

Calibration to NIST and PTB
The certified source strength of IsoSeed® is based on air kerma measurements. The source strength of IsoSeed® I25.S17plus is calibrated traceable to the primary SK,N99 standard of the NIST (National Institute of Standards and Technology), the source strength of IsoSeed® I25.S06 is calibrated traceable to the primary standard of the German national metrology
institute PTB (Physikalisch-Technische Bundesanstalt).

Guaranteed Biocompatibility
The titanium capsule of IsoSeed® is made of implant grade material. The finished products have been tested for biocompatibility.

Quality Made in Germany
The production of IsoStrand® is performed at the manufacturing facility in Berlin, Germany, operating under strict quality and regulatory standards. Eckert & Ziegler BEBIG is certified according to ISO 13485.

For additional information, please see:
Fact sheet IsoStrand® (EN)