Skip to Main Page ContentSkip to SearchSkip to Site Map NavigationSkip to Footer Links

        - Home

        - FAQ
        - Glossary
        - Facility Locator
        - What's New
        - Site Help
        - Index A-Z
        - Contact Us
        - Browse Aloud
        - Email Updates

Report a Safety Concern

      - Nuclear Reactors  - Power Reactors
- Research & Test Reactors
- Operating Reactors
- Operator Licensing
- New Reactors
- Advanced Reactors
- Operator Licensing for New Reactors
- Nuclear Reactor Quick Links
 
      - Nuclear Materials  - Special Nuclear Material
- Source Material
- Byproduct Material
- Med, Ind, & Academic Uses
- Source Materials Facilities
- Uranium Recovery
- Fuel Cycle Facilities
- Materials Transportation
- Nuclear Materials Quick Links
 
      - Radioactive Waste  - Low-Level Waste
- Waste Incidental to Reprocessing
- High-Level Waste
- Uranium Mill Tailings
- Low-Level Waste Disposal
- High-Level Waste Disposal
- Storage of Spent Nuclear Fuel
- Transporation of Spent Nuclear Fuel
- Radioactive Waste Quick Links
 
      - Nuclear Security  - Domestic Safeguards
- Information Security
- Radioactive Material Security
- Contact Us
 
      - Public Meetings & Involvement  - The NRC Approach to Open Government
- About Meetings Open to the Public
- Conferences & Symposia
- Documents for Comment
- Facilitating Stakeholder Involvement
- NRC Information Quality Guidelines
- Subscribe to E-mail Updates
- Commission Schedule
- Public Meeting Schedule
 
      - NRC Library  - Basic References
- Document Collections
- ADAMS Public Documents
- Public Document Room
- Get Copies of Documents
- FOIA & Privacy Act Requests
- Photos & Video
- Records Management 
- Withholding of Sensitive Information
- FAQ Index
- HLW Licensing Network
- Adjudications (Hearings)
 
      - About NRC  - The Commission
- Governing Legislation
- Plans, Budget, & Performance
- Organization & Functions
- Locations
- History
- Values
- Direction-Setting & Policymaking
- Radiation Protection
- Fire Protection
- How We Regulate
- Emergency Preparedness & Response
- Public Affairs
- Congressional Affairs
- International Programs
- State & Tribal Programs
- Alternative Dispute Resolution Programs
- Employment Opportunities
- Contracting Opportunities
- Grant Opportunities
- Civil Rights
 

PrintShare

Email

Print

TwitterFacebookMySpace

DelicousStumbleDigg

More...

HomeNRC LibraryDocument CollectionsGeneral CommunicationsInformation Notices1994

# 

```

UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS
WASHINGTON, D.C.  20555

May 27, 1994


NRC INFORMATION NOTICE 94-37: MISADMINISTRATION CAUSED BY A BENT INTERSTITIAL
 NEEDLE DURING BRACHYTHERAPY PROCEDURE


Addressees

All U.S. Nuclear Regulatory Commission Medical Licensees authorized to use
brachytherapy sources in high-, medium-, and pulsed-dose-rate remote
afterloaders.

Purpose

NRC is issuing this information notice to alert NRC licensees of an incident
involving an interstitial needle bent inside the patient's body during a
high-dose-rate procedure with an Omnitron 2000 brachytherapy system.  The
bend in the Omnitron interstitial needle, through which the radioactive
source travels, prevented the source from retracting beyond the point of the
bend. This resulted in the actual radiation dose received by the patient
exceeding the prescribed dose by approximately 75 percent.  It is expected
that recipients will review this information for applicability to their
facilities and consider actions, as appropriate.  However, suggestions
contained in this information notice are not new NRC requirements; therefore,
no specific actions nor written response is required.

Description of Circumstances

On January 13, 1994, at the end of an interstitial lung treatment, the source
wire containing a 144.3 gigabecquerel (3.9 curie) iridium-192 source failed to
retract to the shielded storage position.  Members of the medical staff
followed appropriate emergency procedures and removed the needle from the
patient.  Licensee personnel noted a kink in the interstitial needle after
removal.  Once outside the patient's body, the source retracted into the
shielded position.  As a result of the stuck source, the dose to the last
treatment position was 17.32 gray (Gy) (1732 rads) versus the prescribed dose
of 10 Gy (1000 rads).  In addition, an area just below the last treatment
location received a dose of approximately 14 Gy (1400 rads) versus the 8 Gy
(800 rads) intended in the prescribed treatment plan.

The kink in the needle occurred at a location where the interstitial needle
extended beyond a biopsy needle to facilitate the insertion.  Under this
configuration, the biopsy needle acted as a sleeve covering approximately 75
percent of the interstitial needle.  The licensee's preliminary conclusion was
that the kink at the interface between the interstitial and biopsy needles was
caused by a sudden movement of the patient near the end of the treatment.  The
licensee reached this conclusion on the basis that X-rays taken just before
the treatment revealed no unusual conditions and the treatment was uneventful

9405230065.IN 94-37
May 27, 1994
Page 2 of 2


until the patient's sudden movement.  When the biopsy and interstitial needles
were withdrawn from the patient, the kink in the interstitial needle was
relieved somewhat, allowing the source to return to the storage position.
Early during the needle insertion process, it had been difficult to insert a
different Omnitron needle through the patient's rib cage to the treatment
site.  As a result, licensee physicians opted to use a biopsy needle, through
which the interstitial needle was placed in the desired location.  Believing
that the shielding provided by the biopsy needle would interfere with the
delivery of the radiation dose, a physician retracted the biopsy needle to
just outside the treatment site.

Discussion

Needles and other accessories to high-dose-rate remote afterloading therapy
may be subjected to unusual mechanical stresses during patient treatment.
Each patient setup should be carefully evaluated to avoid or minimize the
potential for deformation of needles and other guides.  In particular,
reducing thickness or withdrawing another device in order to preserve dose
rate may not be in the best interests of safety.  In most instances, any
reduction in dose rate may be compensated by a modest increase in treatment
time.  If the use of extremely thin materials cannot be avoided, licensees
should ensure that their operating and emergency procedures are adequate to
prevent and mitigate the consequences of mechanical deformations in the path
of the source wire.  In such circumstances, surgical intervention may be
required and should be included in emergency plans as required in NRC
Bulletin 93-01.

This information notice requires no specific action nor written response.  If
you have questions about the information in this notice, please contact the
technical contact listed below or the appropriate regional office.

                        original signed by
                        E. William Brach

                    Carl J. Paperiello, Director
                    Division of Industrial and
                      Medical Nuclear Safety
                    Office of Nuclear Material Safety
                      and Safeguards


Technical contacts:  Hctor Bermdez, RII
   (404) 331-7880

   James Smith, NMSS
   (301) 415-7904

Attachments:
1.  List of Recently Issued NMSS Information Notices
2.  List of Recently Issued NRC Information Notices
```

*Page Last Reviewed/Updated Wednesday, February 16, 2011*

#### Home

            - News Releases
            - Event Reports
            - ADAMS
            - Open Gov
            - Students & Teachers
            - Photos & Video

#### About Us

            - Strategic Plan
            - Budget & Performance
            - Perf & Accountability Rept
            - History of the NRC
            - Employment
            - NRC Ethics
            - Agency Status

#### Popular Documents

            - Info Digest
            - Factsheets & Brochures
            - Forms
            - Electronic Submittals
            - NRC Reports – NUREG
            - NRC Regulations – 10-CFR
            - Inspection Reports

#### Follow Along

            - Blog
            - RSS

Regulations.govUSA.govExpectMore.govRecoveryFOIANo Fear EEOInspector GeneralSite MapAccessibilityPrivacy PolicySite DisclaimerFor Employees