OBS Electrosurgical Generator (Model: OBS-350A)

K162034 · Baisheng Medical Co., Ltd. · GEI · Jan 30, 2017 · General, Plastic Surgery

Device Facts

• Record ID: K162034
• Device Name: OBS Electrosurgical Generator (Model: OBS-350A)
• Applicant: Baisheng Medical Co., Ltd.
• Product Code: GEI · General, Plastic Surgery
• Decision Date: Jan 30, 2017
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 878.4400
• Device Class: Class 2
• Attributes: Therapeutic, 3rd-Party Reviewed

Intended Use

The Electrosurgical Generator (OBS-350A) is a non-sterile, reusable multi-purpose electrosurgical generator that is designed to perform monopolar and bipolar functions in the surgical operation area.

Device Story

The OBS-350A is a reusable electrosurgical generator used in surgical settings to perform cutting and coagulation. It accepts inputs from electrosurgical pencils, bipolar forceps, and footswitches. The device transforms electrical energy into high-frequency (HF) output (330-460 kHz) to achieve tissue effects. It features multiple modes: three CUT modes (Pure, Blend 1, Blend 2), three COAG modes (Spray, Forced, Soft), and two Bipolar modes (Macro, Micro). A Contact Quality Monitoring System (CQMS) monitors resistance between the patient and the return electrode, triggering alarms and disabling output if resistance exceeds 113 ohms to prevent burns. A Peak Power System (PPS) automatically adjusts output voltage based on tissue resistance to maintain consistent effects. The device includes memory presets and self-diagnostics. Surgeons operate the device via front panel controls and footswitches. The output provides precise tissue cutting and hemostasis, benefiting patients by enabling controlled surgical intervention.

Clinical Evidence

Bench testing only. No clinical or animal studies were performed. Bench validation compared electrical waveforms and tissue thermal effects (porcine muscle, kidney, liver) against the predicate device. Results confirmed comparable tissue effects and electrical waveforms across all operating modes.

Technological Characteristics

Enclosed in metal/molded plastic; front panel controls. HF energy source (330-460 kHz). Complies with IEC 60601-1, IEC 60601-2-2, and IEC 60601-1-2. Features CQMS (resistance monitoring) and PPS (automatic voltage adjustment). Memory for 10 presets. Reusable, non-sterile.

Indications for Use

Indicated for use in surgical procedures requiring monopolar and bipolar electrosurgical cutting and coagulation.

Regulatory Classification

Identification

An electrosurgical cutting and coagulation device and accessories is a device intended to remove tissue and control bleeding by use of high-frequency electrical current.

Predicate Devices

• Valleylab Force FX (K944602)

Submission Summary (Full Text)

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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002

January 30, 2017

Baisheng Medical Co., Ltd. % Mr. Albert T.W. Li Manager, Principle Administrator Office of Medical Device Evaluation Center for Measurement Standards Industrial Technology Research Institute Room 307, Bldg. 4, 321, Sec. 2 Kuang Fu Rd Hsinchu, Taiwan 30011 R.O.C.

Re: K162034

Trade/Device Name: OBS Electrosurgical Generator (model: OBS-350A) Regulation Number: 21 CFR 878.4400 Regulation Name: Electrosurgical Cutting and Coagulation Device and Accessories Regulatory Class: Class II Product Code: GEI Dated: July 22, 2016 Received: July 22, 2016

Dear Mr. Li:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical device

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related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number [phone] or [phone] or at its Internet address

http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to

http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.

You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number [phone] or [phone] or at its Internet address

http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.

Sincerely yours.

Jennifer R. Stevenson -S

For Binita S. Ashar, M.D., M.B.A., F.A.C.S. Director Division of Surgical Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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# Indications for Use

510(k) Number (if known) K162034

Device Name OBS Electrosurgical Generator

### Indications for Use (Describe)

The Electrosurgical Generator (OBS-350A) is a non-sterile, reusable multi-purpose electrosurgical generator that is designed to perform monopolar and bipolar functions in the surgical operation area.

| Type of Use (Select one or both, as applicable) |
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| <label><input checked="true" type="checkbox"/> Prescription ID #1-977-901-Patient Pharmacy</label> | <label><input type="checkbox"/> Over The Counter Health #1-977-901-Patient Pharmacy</label> |
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X | Prescription Use (Part 21 CFR 801 Subpart D)

| | Over-The-Counter Use (21 CFR 801 Subpart C)

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Image /page/3/Picture/0 description: The image shows the logo for OBS, which is a green, stylized water droplet followed by the letters "OBS" in a bold, sans-serif font, also in green. A registered trademark symbol is located in the upper right corner of the logo. The logo is simple and clean, suggesting a focus on water or environmental concerns.

# PREMARKET NOTIFICATION 510(K) Summary

This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and Title 21 CFR §807.92.

The assigned 510(k) Number:_ K162034

1.0 Sponsor Identification

| Baisheng Medical Co.,Ltd. | |
|---------------------------|------------------------------------------------------------------|
| Address: | No.11, Fusheng Road, Xinhui District, Jiangmen Guangdong, China. |
| Phone: | [phone] [phone] |
| Fax: | [phone] |
| General manager: | Mr Chen xi |
| E-mail: | [e-mail] |
| Contact person: | Peter |
| E-mail: | [e-mail] |
| Date | Mar 27th, 2015 |

2.0 Proposed Device Identification

| Trade Name: | OBS Electrosurgical Generator |
|--------------|-------------------------------|
| Model: | OBS-350A |
| Common Name: | Electrosurgical Generator |

Regulatory Information:

| Classification Name: | electrosurgical, cutting & coagulation & Devices and accessories; |
|----------------------|-------------------------------------------------------------------|
| Classification: | Class II(Product Code GEI) |
| Regulation Number: | 21CFR 878.4400 |
| Review Panel: | General& Plastic Surgery |

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Image /page/4/Picture/0 description: The image shows a green logo with the letters "OBS" in a stylized font. The "O" is shaped like a water droplet, and the "B" and "S" are connected. There is a registered trademark symbol in the upper right corner of the logo. The logo is simple and clean, and the green color suggests a connection to nature or the environment.

3.0 Predicate Device Identification: 510(k) Number: K944602 Predicate Device Trade name: Valleylab Force FX Manufacturer Name: VALLEYLAB INC. Address: 5920 LONGBOW DRIVE BOULDER, CO 80301

## 4.0 Indication for use

The Electrosurgical Generator (OBS-350A) is a non-sterile, reusable multi-purpose electrosurgical generator that is designed to perform monopolar and bipolar functions in the surgical operation area.

## 5.0 Device Description

- 5.1 Operation modes and functions
#### A 3 CUT modes:

Pure CUT: Pure be used for a clean, precise cut in any tissue with little or no hemostasis.

Blend 1: be applied to any tissues and make slight hemostasis effect while cutting. Blend 2: be applied to any tissues and make good hemostasis effect while cutting.

#### 3 Coaqulation (COAG) modes A

COAG1 (Spray): Spray for coagulating large tissue areas with superficial depth of necrosis.

COAG2 (Forced): can be used in laparoscope surgery and swift contacting coagulation of other elaborate tissues.

COAG3 (Soft): Its coagulation effect on the tissues is deep, but the scope is rather small because of its good effect on the single blood spot.

#### 2 Bipolar modes A

Bipolar1 (Macro): be used for rapid coagulation such as artery vessel sealing, the voltage is higher and there is more power than the other bipolar mode.

Bipolar2 (Micro): be used for most bipolar applications, voltage is kept low to prevent sparking, the power remains constant over a specific range of tissue resistance, allowing consistent tissue effect.

K162034

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Image /page/5/Picture/0 description: The image shows the green OBS logo. The logo consists of a stylized green drop shape followed by the letters "OBS" in a bold, sans-serif font, also in green. A small registered trademark symbol is located in the upper right corner of the logo.

5.2 Physical Characteristics:

The generator is enclosed in a metal and molded plastic enclosure and will have an angled front panel in the display and controls area. The front panel displays and controls will be sealed to facilitate cleaning and minimize the possibility of problems caused by accidental spills. The receptacles for the active electrosurgical accessories will be in a recessed area and will conform to IEC60601-1:2005/(R) 2012 And A1:2012.

5.3 Device components

Chassis and Cover, Front panel controls, Power supply board, Microprocessor board, Footswitch board, Interface circuits, Front panel receptacles.

5.4 Accessories compatible

- A First, the accessories shall be Legally marketed in America;
- A Second, Compatibility data: max electrical capacity of these accessories ≥4500 Vp which will be available.
- く Electrosurgical pencil
- イ Split Electrosurgical pad (also named neutral electrode, return electrode, neutral pad...)
- く Electrosurqical bipolar forceps
- く Footswitch for Monopolar procedures
- く Footswitch for Bipolar procedures
- く Cord for bipolar forceps
- く Cord for electrosurgical pad

Note: The proposed device in this submission is only the ESU generator submitted. To avoid incompatibility and unsafe operation, we recommend using the following OBS accessories with the OBS-350A:

- > Electrosurgical pencil (510(k) No.: K092634) OBS-Db(#0039D, #0039H, #0025D, #0035H) OBS-Dr(#0038D, #0038H, #0030D, #0030H) OBS-Df(#0048D, #0048H, #0040D, #0040H)
- V Split Electrosurgical pad (510(k) No .: K102372) GBS-Db(#1031a, #1131a, #1031b, #1131b, #1041a, #1031n, #1131n, #2031, #2131, #3031, #1031ac, #1041ac)
- 5.5 Special features
- A Three CUT modes: Pure CUT, Blend 1, Blend 2;
- > Three COAG mode: COAG1(Spray), COAG2(Forced), COAG3(Soft);
- > Two Bipolar modes: Bipolar1(Macro) and Bipolar2(Micro);
- A Memory: 10 memory Presets, the unit automatically reset to the last activated Preset setting:

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Image /page/6/Picture/0 description: The image shows the logo for OBS, which is a green stylized water droplet followed by the letters "OBS" in green. A registered trademark symbol is located in the upper right corner of the logo. The logo is simple and clean, and the green color suggests a connection to nature or the environment.

CQMS (contact quality monitoring system): The ESU pad contact quality monitor system (CQMS) will measure the resistance bewteen the ESU pad and patient, if the resistance was beyond the defined upper limit, the alarm system will be activaed. During monopolar electrosurgery, a patient Split ESU pad is always required to safely recover the current that flows through the patient's body and return it to the generator. A reduction in surface area contact or poor conductivity between the patient and the ESU pad can cause the current to become concentrated, potentially resulting in burns at the ESU pad site.

The OBS-350A generator uses the CQMS to monitor the quality of electrical contact between the patient ESU pad and the patient. The CQMS function is designed to minimize the risk of burns at the ESU site due to a reduction in patient contact area during monopolar electrosurgery.

- A How the CQMS works
The CQMS continuously measures the resistance at the ESU pad site and compares it to a standard value of safe resistance (less than 113ohms), thus under the condition of ESU pad releases or shrinks, the contact area to skin would be reduced, and the contact resistance increased, when the resistance is above 113ohms, the alarm will be activated by Red of "ALARM" indicator as well as Error code(Err--0) displayed on the CUT screen, at the same time a continuous alarm voice( > 65db) initiated, and the generator will stop output simultaneously, the alarm cannot be disabled unless the ESU pad adhered in a good condition again.

- A Power ON self diagnostics: In the self diagnosis process after Power ON, all working modes and functions operating are simulated and monitored by software control to determine whether they are performed normally, followed by transmitting of corresponding test data to the display module through the control module. If failure occurs, the respective code will be displayed accordingly as prompt and alarm voice delivered simultaneously, which disables all subsequent operations automatically.
- A PPS (peak power system):The OBS-350A automatically senses resistance and adjusts the output voltage to maintain a consistent effect across different tissue density. This adjustment is based on the selected mode, the power setting and the level of tissue resistance. The maximum output voltage is controlled to reduce capacitive coupling and video interference and to minimize sparking.

। Pure CUT, Blend CUT and Bipolar modes are equipped this PPS function.

## 5.6 Duty Cycle

Under maximum power settings and rated load conditions (pure cut350W, 500ohm load) the generator is suitable for activation times of 10seconds on, 30seconds off for 1 hour.

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Image /page/7/Picture/0 description: The image shows the logo for OBS, which is a green, stylized design. The logo consists of three connected shapes that form the letters 'OBS'. The 'O' is a rounded shape, the 'B' is a similar shape with a vertical line extending upwards, and the 'S' is a curved shape. A small 'R' in a circle, indicating a registered trademark, is located in the upper right corner of the logo.

## 6.0 Performance Data

The performance data were provided in support of the substantial equivalence determination. All standards applied were FDA recognized international standards. The software validation activities were performed in accordance with the FDA Guidance, "Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices" (May 11, 2005). The device software is considered a "Moderate Level of Concern".

### 6.1 Performance Testing - Bench

In general, the evaluations compared the function of the OBS-350A against the performance characteristics defined by the Design Specification and in comparison to the performance characteristics of the predicate devices. To demonstrate substantial equivalence the following aspects were considered within the validation versus the predicate devices. The results demonstrate that comparable tissue effects and electrical waveforms are achieved with subject and predicate devices for all modes of operation.

The purpose of the bench validation testing was to show equivalence of the electrical waveform between the subject and predicate devices. An oscilloscope and high voltage probe were used as measuring and test equipment. The electrical waveforms of the OBS-350A were comparable to the electrical waveforms of the predicate devices. This was confirmed for all output modes (waveforms) at rated load.

The tissue thermal effects test was conducted by OBS-350A and predicate devices to demonstrate the tissue thermal effects equivalence in porcine muscle, kidney and liver tissue. Thermal Zone Damage Report for OBS-350A and predicate devices are provided in Chapter 029_Appendix 8.

Comprehensive validation bench tests demonstrated and confirmed substantial equivalence to the predicate devices. Testing confirmed that comparable tissue effects and electrical waveforms could be achieved for all modes of operation. Clinical and animal studies were not deemed necessary to support substantial equivalence.

## 7.0 Substantially Equivalent (SE) Conclusion

The following table compares the proposed device with the predicate device on respects of intended use, technological characteristics and principles of operation as well as performance conformance.

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Image /page/8/Picture/0 description: The image shows a green logo with the letters "OBS" in a stylized font. The "O" is shaped like a water droplet, and the "S" has a curved, flowing design. A registered trademark symbol is located in the upper right corner of the logo. The logo is simple and clean, with a focus on the letters and the water droplet shape.

| Items | Proposed device<br>OBS-350A | Predicate device<br>(Force FX) | SE<br>Compare |
|---------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|
| Product<br>Code | GEI | GEI | Same |
| Regulation<br>Number | 878.4400 | 878.4400 | Same |
| Indication<br>for use | The Electrosurgical Generator<br>(OBS-350A) is a non-sterile,<br>reusable multi-purpose<br>electrosurgical generator that is<br>designed to perform monopolar<br>and bipolar functions in the<br>surgical operation area. | The Valleylab Force Fx is an<br>isolated, microprocessor based<br>ESU generator intended for use in<br>the operating room for general<br>procedures where ESU cutting<br>and coagulation is required. The<br>generator is equipped with<br>monopolar and bipolar outputs. | SE |
| Energy | HF energy | HF energy | Same |
| Input power | 120V/230V, 60Hz/50Hz | 100-120V/220-240V, 60Hz/50Hz | SE |
| Power<br>consumption | 880VA | 850VA | SE |
| Output<br>frequency | 330~460KHz Sinusoid | 390~470KHz Sinusoid | SE |
| Output Mode | Pure cut:<br>350Wmax, Load:500Ω,<br>Blend 1(macro):<br>250Wmax, Load:500Ω,<br>Blend 2(micro):<br>150Wmax, Load:500Ω,<br>COAG1(Spray):<br>120Wmax, Load:500Ω,<br>COAG2(Forced):<br>100Wmax, Load:500Ω,<br>COAG3(Soft):<br>50Wmax, Load:500Ω,<br>Bipolar1(macro):<br>100Wmax, Load:100Ω,<br>Bipolar2(micro):<br>100Wmax, Load:100Ω, | Low cut: 300Wmax, Load:300Ω,<br>Pure cut:300Wmax, Load:300Ω,<br>Blend: 200Wmax, Load:300Ω,<br>Low(Desiccate):120Wmax,<br>Load:500Ω, Crest factor:5.0<br>Med(Fulgurate):120Wmax,<br>Load:500Ω, Crest factor:7.0<br>High(Spray):120Wmax,<br>Load:500Ω,<br>Crest factor:8.0<br>BIPOLAR:<br>Low(Precise):70Wmax, Load:100Ω,<br>Med(Standard) :<br>70Wmax, Load:100Ω,<br>Macro:70Wmax, Load:100Ω, | SE |
| | | | |
| Items | Proposed device<br>OBS-350A | Predicate device<br>(Force FX) | SE<br>Compare |
| Open circuit<br>Vp-p(max) | Monopolar CUT<br>Pure: 2120V<br>Blend1: 2720V<br>Blend2: 2200V<br>Monopolar COAG<br>COAG1(Spray):4500V<br>COAG2(Forced): 4150V<br>COAG2(soft): 2500V<br>Bipolar:<br>Bipolar1(macro): 500V<br>Bipolar2(micro):350V | Monopolar CUT<br>Low: 1350V<br>Pure: 2300V<br>Blend: 3300V<br>Monopolar COAG<br>Desiccate:3500V<br>Fulgurate: 8500V<br>Spray: 9000V<br>Bipolar:<br>Precise: 450V<br>Standard: 320V<br>Macro: 750V | SE |
| Output<br>waveform | Monopolar and bipolar | Monopolar and bipolar | SE |
| Safety | ES60601-1:2005/(R)2012<br>And A1:2012 | IEC60601-1:2005 | Same |
| Performance | IEC60601-2-2:2009 | IEC60601-2-2:2009 | Same |
| EMC | IEC60601-1-2:2007 | IEC60601-1-2:2007 | Same |

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Image /page/9/Picture/0 description: The image shows the logo for OBS, which is a green, stylized water droplet next to the letters "OBS" in a bold, green font. A circled "R" trademark symbol is located in the upper right corner of the image. The background is white.

The tissue thermal effects tests by OBS-350A and predicate devices demonstrate the similarity of thermal effects in three tissues, verified substantial equivalence with predicate devices.

## 8.0 Comparison to Predicate Devices and conclusions

The Electrosurgical Generator model OBS-350A has the same intended use, operating procedures, principles of operation, technology and tissue thermal effects as the predicate devices. The OBS-350A does not raise additional issues of safety or efficacy compared to the predicate devices, and the slight differences have been proved to be substantial equivalence by performance bench test and comparison analyzing. Thus, the subject device and predicate device are substantial equivalence (SE).