510(k) · Cleared
ClearedAnalgesic Pulser, Model AP-439
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Johari Electro-Tech Co. · GZJ Stimulator, Nerve, Transcutaneous, For Pain Relief
Cleared on Feb 2, 2001 as substantially equivalent to K964028 (Mettler Electronics Corp., 1997) after a 494-day review. Its family tree reaches back 1 generation to 1997. 1 later device descends from it.
- Decided
- Feb 2, 2001
- Review
- 494 days
- Class
- Class II
- Product code
- GZJ
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 1 generation to K964028 (1997). 1 later device descends from it, 1 citing it directly.
- Root · 1 generation backK964028 Sys Stim 226Mettler Electronics Corp. · 1997
- This deviceK993229 Analgesic Pulser, Model AP-439Johari Electro-Tech Co. · 2001
- Descendant · cites it directly · 0 of its ownK024036 Product Line-Combo Stimulator/Sequential Stimulator, Model IF-5000Johari Digital Healthcare, Ltd. · 2002
Most influential descendants
Showing 1 of 1 · See all- K024036Product Line-Combo Stimulator/Sequential Stimulator, Model IF-5000Johari Digital Healthcare, Ltd. · 2002 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −1 | K964028 | Sys Stim 226 | Mettler Electronics Corp. | 1997 | — |
| 0 (this device) | K993229 | Analgesic Pulser, Model AP-439 | Johari Electro-Tech Co. | 2001 | — |
| +1 | K024036 | Product Line-Combo Stimulator/Sequential Stimulator, Model IF-5000 | Johari Digital Healthcare, Ltd. | 2002 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2002 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in GZJ? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new GZJ device
- #1 K252767 actiTENS miniscore 13.1 · 9 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (3)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K964028 | Sys Stim 226Summary page 2…Physical Medicine (Per 21 CFR Section 890) and Neurology (Per 21 CFR Section 882.5890). Legally Marketed Device I (a) Sys stim 226 : Muscle Stimulator 510(k) Number K964028 (b) Sys stim 206 Manufacturer : Mettler Electronics Corp. Address : 1333 S. Claudia St. Anaheim Ca. 92805 Tel. : 001 (714) 533… | 1997 |
| * | — | Sys stim 206 Named without a submission number | |
| * | — | Sportx Named without a submission number |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K024036 | Product Line-Combo Stimulator/Sequential Stimulator, Model IF-5000 | 2002 | 0 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Its one ancestor has no recall.
- Of its descendants, K024036 (Johari Digital Healthcare, Ltd., 2002) has gone furthest, with 0 descendants of its own.
How does its category compare?
All GZJ devicesGZJ Stimulator, Nerve, Transcutaneous, For Pain Relief: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · GZJ
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · GZJ
207in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · GZJ
1in 2011
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · GZJ
13in 2025
MAUDE reports naming product code GZJ, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 13 | 223 | 4 | 4 |
| 2008 | 11 | 136 | 1 | 45 |
| 2009 | 16 | 155 | 0 | 17 |
| 2010 | 5 | 232 | 0 | 22 |
| 2011 | 5 | 168 | 1 | 22 |
| 2012 | 12 | 154 | 0 | 20 |
| 2013 | 2 | — | 0 | 10 |
| 2014 | 4 | 344 | 0 | 23 |
| 2015 | 3 | 202 | 0 | 18 |
| 2016 | 3 | 163 | 0 | 32 |
| 2017 | 3 | 113 | 0 | 58 |
| 2018 | 2 | — | 0 | 21 |
| 2019 | 3 | 156 | 0 | 7 |
| 2020 | 4 | 183 | 0 | 10 |
| 2021 | 3 | 231 | 0 | 5 |
| 2022 | 4 | 175 | 0 | 4 |
| 2023 | 1 | — | 0 | 39 |
| 2024 | 3 | 207 | 0 | 12 |
| 2025 | 1 | — | 0 | 13 |
| 2026 | 2 | — | 0 | — |
What is it indicated for?
(A) Interferential current stimulation, Premodulated Bipolar Mode and Faradic Stimulation Mode is indicated for; 1 Symptomatic relief and management of chronic (long term) intractable pain. 2 Adjunctive treatment in the management of post-surgical and post-traumatic, acute pain conditions. (B) Electrical Muscle Stimulation (Russian and Galvanic-Interrupted) is indicated for: Relaxation of Muscle spasm. Prevention or Retardation of disuse atrophy.…
Read the full statement (93 words)
(A) Interferential current stimulation, Premodulated Bipolar Mode and Faradic Stimulation Mode is indicated for;
1 Symptomatic relief and management of chronic (long term) intractable pain.
2 Adjunctive treatment in the management of post-surgical and post-traumatic, acute pain conditions.
(B) Electrical Muscle Stimulation (Russian and Galvanic-Interrupted) is indicated for:
Relaxation of Muscle spasm.
Prevention or Retardation of disuse atrophy.
Increasing, local blood circulation.
Muscle re-education.
Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
6. Maintaining or increasing range of motion
(C) Galvanic-DC Continuous mode is indicated for:-
1. Relaxation of muscle spasm.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K993229 · printed Nov 4, 2026
Cite this page
510(k) Report. “K993229: Analgesic Pulser, Model AP-439.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K993229
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026