The following article together will help you to keep your Madajet working properly. With it, you will be able to set up a normal maintenance routine for your injectors.

This article also includes an FAQ section that answers questions that many Madajet users have posed over the years. Additionally, you will find videos that provide a look at how physicians with many years of experience in using the injectors, clean, sterilize, and otherwise maintain their jets.



When your Madajet injector arrives, it’s best to take a moment to familiarize yourself with the various parts of the injector first. You can do this by examining the diagram on page 6A of the Instruction Manual or on this page.


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The Madajet comes packed in a non-sterile sealed plastic bag. Although it has been thoroughly disinfected with MadaCide-FD (#2527) , you may choose to autoclave it for its first use. Please check the manufacturers directions for your autoclave.

The following are general directions for steam autoclaving the Madajet:

• Open the plastic wrapping on the injector and unscrew head assembly and pyrex fill chamber from the body. Do not remove the Extenda Tip.

• Each component, including the MadaJet injector body, is to be wrapped separately in sterilization pouches and put in the autoclave. Be sure to pull the cocking lever down (until it clicks) on the MadaJet injector body prior to placing it in its’ sterilization pouch.

• The Madajet XL requires steam autoclaving by one of the following two methods:

1. Steam Pre-Vacuum Method

- Temperature: 132 C (270 F) Exposure Time: 4.0 Minutes

2. Steam Gravity Method

- Temperature: 132 C (270 F) Exposure Time: 15 Minutes


After autoclaving, remove all parts and allow to cool to room temperature before assembling and use.

It’s important to carefully review the instructional materials provided in the package with your injector. They not only help you to get the best use of your MadaJet but also include certain cautionary warnings to help you avoid unsafe practices.





1. Unwrap parts using sterile gloves.

2. Insert the glass chamber (#2306) onto head assembly and transfer 3 cc of 2% Lidocaine with your syringe from a carpule or multi-dose vial into the chamber* (see illustration A). (Hint: for a better seal between the fill chamber and head assembly "wet" the base of the chamber with sterile water or anesthetic prior to insertion into the head.) * Capacity of fill chamber is 6cc.

3. Insert head assembly with glass chamber gently back into the body keeping the instrument in a vertical position with the head pointing down.

4. Prime the instrument by gently pushing the body into the head assembly up and down on the shaft. A small amount of liquid will be expressed from the nozzle. This indicates that there are no air bubbles in the injection stream. If you do not see solution spray from the nozzle when you prime the instrument, check that the cocking lever is not already cocked. Screw the head assembly back on the body, cock and fire 1-2 times.

5. Place MadaJet into the stainless steel stand after you have put approximately 30 cc of MadaCide-FD (#2527) into the stand. You are now ready to use your MadaJet. After use on each patient, place it back into the stand with the head immersed in 30 cc of the MadaCide-FD disinfecting solution for no less than 6 minutes.



1. Unscrew head assembly and pour out any unused anesthetic solution. Note that most anesthetic solutions will cause a brown discoloration of metal parts if any remnants are allowed to remain in the instrument for more than 1-2 days. Therefore, always pour out any remaining anesthetic solutions each evening.

2. Fill the head assembly with sterile or distilled water and prime the head 2-3 times before autoclaving the entire unit. (For more details on autoclaving the Madajet, see "Sterilizing with Steam Autoclave" below)

3. If you do not plan to autoclave the injector, pour 3 cc of MadaCide-FD (#2527) solution into the head assembly and prime 2-3 times to clear out any anesthetic or medication solution. With the remaining MadaCide-FD solution left in the head assembly, place unit into the MadaJet stand and leave overnight or until next use.

Note: It is recommended that at the end of each day of use or at the end of the week of use, you should use the Mada Ultrasonic Cleaner (item# 2310) to thoroughly clean the injector per ultrasonic cleaning instructions.


Pour out all remaining MadaCide FD solution and rinse the unit with sterile or distilled water. Prime the head assembly 2-3 times and follow points #2 through #5 "For Daily Use" above.





The Mada Digital Ultrasonic cleaner (item# 2310) is designed perform a high power cleaning of even the tiniest areas of the head assembly of the injector, keeping it clear of sediments and particles. 

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When the head of the MadaJet as well as the chamber area are lowered into the cleaner, cavitation causes high powered microjets of liquid to be propelled throughout the bath of cleaning solution thus removing even the most tenacious particles hidden in crevices of the device upon impact.

Not only does ultrasonic cleaning provide a mechanism to blast away hard to remove soils but it also improves the chemical efficiency of the MadaCide (#2527) disinfectant solution. Acoustic cavitation raises the temperature of the liquid which increases the rate of chemical activity of the cleaning solution.

The Mada Ultrasonic Cleaner also cleans your other surgical instruments.




• Fill the (Item# 2310) Ultrasonic tank with clean tap water to full (maximum).

• Add 3 ounces of MadaCide-FD (#2527).

 • Remove Madajet XL head assembly from Madajet XL body. Remove glass fill chamber (#2306) and metal Weiss sheath (#2525) and place these parts into the (Item #2310-R) rack.

 • Place rack into Ultrasonic unit by hanging it with built-in clip on side of Ultrasonic unit Be sure all parts of the head assembly are covered by liquid.

 • Place custom Ultrasonic Lid with two holes on top of the Ultrasonic top.

 • Insert Madajet XL less head assembly into one of the lid holes.

 • Turn Ultrasonic unit on for 10 minutes to provide disinfecting and cleaning action.

 • After 10 minutes, remove the Madajet XL body and head assembly and rinse with sterile water.

 • If sterilization is required, follow recommended autoclave procedures after using the Ultrasonic unit. If sterilization is not required, assemble the glass fill chamber and metal Weiss sheath onto the Madajet XL head assembly and fill the glass fill chamber with MadaCide-FD. Replace Madajet XL head assembly onto Madajet and store in Madajet XL stand filled with MadaCide-FD (#2527) until ready for next use.

 • Before using your Madajet XL again, be sure to empty the MadaCide-FD solution out of the glass fill chamber and flush out with sterile water before introducing the anesthetic solution.



The most common and readily available method for sterilizing the Madajet is autoclaving. However, it is not advisable to use a “dry heat” autoclave since it may cause the washers inside the injector to dry out and crack. These parts can likewise be damaged if the injector is frequently chemically sterilized. Steam autoclave tends to yield the best results.

All components of the MadaJet injector must first be thoroughly cleaned and disinfected to achieve maximum sterilization. Although there are some variations in the use of autoclaves, the general guidelines used for sterilizing the MadaJet injector are as follows...

Cock, the injector and unscrew the head assembly and pyrex fill chamber from the body. Do not remove the Extenda Tip. Wrap injector body, head assembly and fill chamber separately and place in the autoclave.
Steam Pre-Vacuum Method
• Temperature: 132 C (270 F) Exposure Time: 4.0 Minutes
Steam Gravity Method
• Temperature: 132 C (270 F) Exposure Time: 15 Minutes
After autoclaving, remove all parts and allow to cool to room temperature before assembling and use. Again, it is important to review recommended directions by the manufacturer of the autoclave. 


Even though the MadaJet injector can stand up to rigorous use, it must be routinely serviced by the manufacturer to remain in good condition.

Approximately one year after the first use of your injector, it should be returned to the manufacturer so that all parts can be inspected and worn rubber seals can be replaced. (See "Submitting a Service Request" below) Since this service may require 2-4 weeks, you will need to prepare to be without your injector for that period of time. If you choose to purchase a secondary unit a discount may apply. In such case, please complete the web form on the "Contact Us" page.

WARRANTY: Since the injector is covered by a limited warranty for one year after your purchase date, needed repairs may be covered. If you have questions regarding when your unit was purchased, contact us with the serial number on your injector. To obtain warranty service send your MadaJet to Mada Medical at the at 625 Washington Avenue Carlstadt, NJ 07072.

After your unit is received and assessed by the manufacturer, you will be contacted by their Technical Service Department with details for your repair. If repairs are required which are not covered by the warranty, they will be billed accordingly.

Note: Failure to notify Mada within 30 days of receipt of what is believed to be a damaged unit shall be considered a waiver of claim.

MISSING PARTS: On occasion smaller parts of the injector may be misplaced by staff during cleaning thus requiring the entire unit to be returned for service. These parts include the top or main seals, metal washer, ball valve, etc. However, if parts such as the glass chamber (#2306), metal Weiss steel sheath (#2525), or Extenda tip (2403-75) are missing or damaged, you may simply order replacement parts on (Please see "Related Items" section on this page.)

NEED FOR REPAIR: If your injector stops working you may spare much time and expense by reviewing the suggestions below in the Frequently Asked Questions. This section deals with issues such as diminished anesthetic effect, popping sounds, appearance of rust-like staining. These issues may not require service by the manufacturer but are often solved with minor user adjustments.

SUBMITTING A SERVICE REQUEST: Once you've determined that your injector must be serviced, please follow these steps...

• Download the Service Request Form

• Complete the form and fax to 718.352.2984 (outside USA please use web form on "Contact Us" page)

• Ship the injector to Mada Medical at 625 Washington Avenue Carlstadt, NJ 07072 USA

• Address package (Attention: MadaJet Repair/Technical Service Department)

• Enclose a copy of the completed form with the injector

• Allow 2-3 weeks