Surgical Diathermy
A single piece of equipment can make the difference between a successful surgery and a prolonged and perilous recovery. Despite this, several purchasers and new members of the operating theatre staff are still unsure of the difference between a monopolar and a bipolar, or a good surgical diathermy and a poor one. In Pakistan, that confusion comes with a price tag. Hospitals in Lahore, Karachi, and Multan are finding themselves with a growing number of surgeries, erratic power supply, and equipment breakdowns without local support.
This guide clarifies the principles of diathermy, when to use it and when not, what precautions are important to ensure patient safety, and what you should consider when purchasing a diathermy unit. It also highlights the expectations of Capasee Electro Medical Engineering in providing and supporting these machines in Pakistan’s hospitals and clinics. Continue reading, and you will be able to make your decision with certainty.
What Is Surgical Diathermy and How Does It Work?
Surgical diathermy is a method whereby high frequency electrical current is passed through the tissue and either cuts or seals bleeding vessels. Tissue resists the current, which then converts to controlled heat where it is applied.
It’s used by surgeons in general surgery and gynaecology. ENT and orthopaedics, as it reduces blood loss and improves the speed of surgery. The theatre in a busy city like Multan are busy, and a minute can be saved in every case by sealing small bleeders with a pencil rather than tying them by hand.
Surgical Diathermy Working Principle Explained for Surgeons
The radio frequency (RF) alternating current is generated by the generator, typically in the range of 300 kHz to several MHz. The resulting current warms tissue at these frequencies, but without stimulating nerves or muscles, so the patient does not twitch.
The cutting mode is continuous cutting with a continuous waveform, which vaporizes the cells along the electrode path. In between are the blend modes, and the coagulation mode pulses the output at high voltage to dry tissue and seal vessels.
You can read this too: Diathermy Electrosurgical Unit Price in Pakistan
Key Components of a Surgical Diathermy Machine (Generator, Electrodes, Return Plate)
Each unit consists of four basic components; the generator, the active electrode (pencil or forceps), the return plate, and a foot or hand switch. Power and mode are provided by the generator, and energy is delivered to the tissue by the electrode in surgical diathermy.
The return plate is the most protective for the patient. The spread of the current is broad; therefore, skin remains cool, and a poorly positioned plate is one of the main causes of skin burns. Before each case, make sure to do the following:
- Clean and dry skin and shave off excess hair.
- Place the plate on a muscular area close to the surgical site.
- Check cables for cracks and loose connections.
- Work from the lowest power up, adding power as necessary.
Types of Surgical Diathermy Machines Used in Pakistan
The monopolar, bipolar, and combined hospital grade units are the main types of hospital equipment being used in Pakistani hospitals, with some purchasing refurbished machines to help with budget constraints. The answer depends upon your procedures, how many cases you see daily, and how fast you can be serviced.
Capasee Electro Medical Engineering provides and services all these types. That allows buyers to do comparisons, as surgical diathermy machines need local installation, training of staff, and availability of spares.
Monopolar vs Bipolar Diathermy: Which Is Best for Your OT?
Monopolar diathermy passes current from the pencil into the patient’s body to a return plate. Smooth cutting and for most general surgery, so it is the go to option for busy theatres.
Bipolar diathermy conducts current between the two tips of forceps and does not require a return plate. This reduces the risk of damage to delicate tissues and nerves, e.g., in ENT, neurosurgery, and gynaecological surgery. In general, a unit with both modes is best suited for a general OT.
Electrosurgical Diathermy Price in Pakistan 2026 (Monopolar, Bipolar, Hospital Grade)
The cost of a new monopolar unit is around PKR 60,000 to 85,000 for the year 2026, and bipolar and hospital grade are higher. Current market ranges are given in the table below.
| Type | Price Range (PKR) | Best For |
| Monopolar Diathermy | 60,000 to 85,000 | General surgery, precise cutting |
| Bipolar Diathermy | 80,000 to 110,000 | Coagulation, delicate procedures |
| Refurbished Diathermy | 50,000 to 70,000 | Budget clinics, reliable performance |
| Hospital Grade Diathermy | 90,000 to 110,000 | High volume OTs, advanced features |
The prices mentioned vary depending on exchange rates and configuration and serve as a guideline only; please contact us for a written quote. Inquire about what is included in the price, such as return plates, pencils, foot switches, warranty, and operator training. A low cost machine with no service provision can be more expensive in the long run, and Capasee will include these with the specifications before you commit to any purchase.
Choosing the Right Surgical Diathermy for Your Hospital or Clinic
The best surgical diathermy unit for you is the one that fits your combination of procedure mix, procedure volume, and access to services. Power output is not as important as if the machine reliably runs for you in your theatre every week.
Use three questions to begin. Who will use it, what will be the number of cases running per day, and who will repair it when it breaks? A day care surgical clinic with ten cases a day requires a very different thing from a teaching hospital with four theatres.
Best Surgical Diathermy Machine Brands Available in Pakistan (Local and Imported)
There are three sources of market in Pakistan. Imported machines from well known manufacturers, locally built machines, and stocked machines that have been refurbished. Assess them according to their construction, spare parts, and warranty, not just their names.
| Source | Strengths | Watch Out For |
| Imported units | Advanced modes, tested safety features | Higher price, slow parts delivery |
| Locally assembled | Lower cost, faster repairs | Inconsistent output, limited documentation |
| Refurbished | Budget friendly, proven designs | Worn cables, unknown service history |
Capasee Electro Medical Engineering assists buyers in the comparison of these options with their actual workload. That is, you are aware of the costs and benefits before you spend, not after the first breakdown.
Where to Buy Surgical Diathermy in Lahore, Karachi, Islamabad: Trusted Suppliers
Purchase from the supplier who offers you installation, operator training, a written warranty, and local service. The only thing price tells you is little about what occurs after delivery.
Prior to ordering, make sure to go through this checklist:
- Request supplier registration and compliance documents and verify with DRAP as applicable.
- Request a live demo in your own theatre.
- Verify the quotation plates, pencils, foot switch, etc.
- Inquire about how much time the engineer will take to arrive in your town.
Before you make your investment, Capasee answers these questions in writing and caters to hospitals and clinics in major cities of Pakistan.
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Surgical Diathermy Safety, Maintenance & After Sales Support in Pakistan
Proper use of surgical diathermy requires proper placement of return plates, dry skin, fire precautions, and routine output testing. Fatal injuries from diathermy are caused by preventable setup mistakes that result in the machine malfunctioning.
A safe theatre does not take safety checks as a major event. Take a nurse, for example. A nurse notes a cracked return cable in the pre op inspection and changes it out in two minutes, avoiding a burn and a delayed list.
Essential Safety Precautions When Using Surgical Diathermy Units
Ensure that the plate is completely in contact with clean, dry muscular skin and not touching any bony prominence, scars, or metal implants. Take off jewelry and prevent the patient from touching earthed metal.
The second large risk is fire. Use preparative alcohol on the skin and allow it to fully dry; ensure there is a low flow of oxygen to the surgical field; and place the electrode in its holster when not in use. Begin at the lowest effective power and increase only as necessary to meet the tissue response.
Diathermy Machine Maintenance, Repair & Service Providers Across Pakistan
A full inspection and output test should be performed annually at the very least, and cables and plates should be inspected prior to each list. Routine servicing can detect the output going “drifting” long before it can cause harm to a patient using surgical diathermy.
Many machines in Pakistan get damaged due to fluctuations in voltage, so make sure to use a suitable stabilizer or online UPS. Capasee Electro Medical Engineering conducts preventive maintenance, repair, training for staff, and installation of your theatre, so that it continues to run and your staff knows how to use it.
Frequently Asked Questions
What are the two types of diathermy?
The two types of diathermy are monopolar and bipolar. Monopolar sends current into the body from a return plate, and bipolar only sends current between two forceps tips. One of them is selected depending on the procedure and the close proximity of nerves and the degree of precision required by the tissue.
What is diathermy vs ultrasound?
Diathermy is the use of electrical or electromagnetic energy to heat the tissue, and ultrasound is the use of high frequency sound waves. In the operating theatre, surgical diathermy cuts or seals tissues. Therapeutic ultrasound is primarily a physiotherapy tool that is used to relieve pain and promote healing and is not a cutting technique.
What is the difference between diathermy and electrocautery?
In diathermy, electricity is sent through the patient’s tissue, while in electrocautery, a metal tip is heated and is applied to the tissue. In electrocautery, there is no body flow of current. It is suitable for simple cauterization, but diathermy allows for more control of cutting and sealing by the surgeon.
What is another name for diathermy?
Diathermy can also be referred to as electrosurgery. Both terms are used by surgeons for the purpose of cutting and sealing tissue by means of high frequency current. The equipment is commonly referred to as an electrosurgical unit or an ESU in Pakistan, and some buyers refer to it as a cautery machine, which is another type of machine.
What is surgical diathermy?
Surgical diathermy is a technique that uses high frequency electrical current to sever tissues or prevent blood loss during surgery. The effect is controlled by the surgeon using the power setting and the mode. These are supplied and serviced by Capasee Electro Medical Engineering in hospitals and clinics throughout Pakistan.
What are the main types of diathermy?
There are two main categories, monopolar and bipolar, and many of today’s machines feature a mix of both. Therapeutic diathermy (shortwave and microwave aside) comprises a different class of apparatus outside the operating theatre. It is used in physiotherapy clinics to heat deep tissue, but not to cut or seal.
How do cut and coagulate modes differ?
The cut mode cuts through tissue, and the coagulate mode seals blood vessels. A lower voltage waveform is used to achieve a clean cut with minimal bleeding at the site where the cut is applied. Coagulate delivers pulsed, higher voltage and dries tissue and closes small vessels, resulting in more heat spread to the surrounding area.
Conclusion
The key factors in a surgical diathermy unit are matching monopolar and bipolar modes to the types of surgeries you are performing, comparing the overall price, accessories, and warranty, and making sure the seller is on their end of the deal after the sale. Have these correct, and your theatre becomes safer, has fewer breakdowns, and has a stable budget.
When you are thinking about buying, give a call to Capasee Electro Medical Engineering today to get a written quote, a live demo, and a crystal clear service plan for your hospital or clinic. Pass out this guide to your OT team so that they are on the same page. All your patients who enter your theatre are protected by good equipment and good support.
