Special suction device
    for vacuum extraction
    and curettage


Powerful universal suction device for gynecology and obstetrics

A prolonged second stage of labour, maternal exhaustion, or a health risk to the baby are situations in which a vacuum-assisted extraction cup delivery is performed. Simple and safe handling is an absolute must. The ATMOS S 351 NATAL with its almost fully automatic vacuum extraction process fulfils the desire of many gynaecologists and obstetricians for more process safety. Unlike forceps delivery, which requires that many steps be performed and demands a great deal of care and experience to avoid injury to mother and child, the ATMOS S 351 NATAL is quick and easy to use.


  • Hospital / clinic
  • Gynecology
  • Gynecology practice

Greater operational safety

Preselectable vacuum parameters, time settings for vacuum build-up and vacuum release as well as two vacuum extraction modes (SEMI and AUTO) provide optimal support to the user when operating the device.

Maximum safety

Sensor-monitored vacuum with acoustic and visual warning messages, a colour display with all relevant information as well as the hydrophobic bacterial and viral filter with filter change indicator ensure maximum safety and extremely easy handling at the same time.

Quiet in the delivery room

The microprocessor-controlled pump in the ATMOS S 351 NATAL ensures maximum performance and minimum noise. The low noise level provides a pleasant atmosphere for the expectant parents, improved user concentration, and optimal communication between users and the expectant parents.

Further indications

In addition to vacuum extraction, the ATMOS S 351 NATAL can also be used for suction curettage, general surgical suction, and bronchial suction in newborns. Thanks to the microprocessor-controlled suction capacity with automatic regulation, the maximum vacuum can be set and thus limited. When the final vacuum is reached, the pump stops automatically and maintains the generated vacuum.

Large selection of matching accessories

The ATMOS Extraction Cup (Malmström) made of autoclavable stainless steel is available in three different diameters (40, 50, and 60 mm). The design of this extraction cup allows for easier and safer handling and also reduces the risk of the cup coming off during vacuum delivery. The ATMOS Cups made of medical silicone are also autoclavable and available in two sizes (50 and 60 mm). The design ensures that the extraction cup has an optimal hold on the foetal scalp. Autoclavable suction curettes in various sizes can be used for suction curettage.

Technical Data


Art. Nr. 444.0491.0, 444.0490.0, 444.0492.0, 444.0493.0, 444.0481.0, 444.0482.0
Suction capacity

36 l/min

Max. vacuum

–90 kPa
–900 mbar

Vacuum control range

0 to –900 mbar

Operating mode

Continuous operation


230 V, 50/60 Hz

Special voltage

100 V, 60 Hz
115 V, 60 Hz
127 V, 50/60 Hz

Dimensions (H x W x D)

300 x 330 x 200 mm (without trolley)
840 x 490 x 520 mm (with trolley)


10.2 kg (without trolley)
14.6 kg (with trolley)

Noise level

< 54 dB(A)


What indications can the ATMOS S 351 NATAL be used for?
The ATMOS S 351 NATAL can be used for vacuum extraction, surgical suction (among others: suction curettage, suction biopsy), and bronchial suction in newborns.
Why is vacuum extraction performed?

The last phase of birth is very stressful for the baby. During contractions, the blood supply to the uterus and placenta is reduced, which can cause acute oxygen deprivation in the baby. At the same time, strong pressure is exerted on the baby’s head, which poses the risk of reduced blood flow to the brain. Depending on the child’s reserves, it may be able to cope with this enormous distress or it may react, for example, with changes on a CTG, such as slowing of the heart rate. In such cases, delivery can be accelerated with the help of an extraction cup.

The extraction cup or forceps can also be used if the pregnant woman is very exhausted.

How is vacuum delivery performed?
The doctor will once again check the cervix as well as the baby’s position and presentation. Once all preparations have been made, the doctor inserts the extraction cup (ATMOS Extraction Cup (Malmström) or ATMOS Cup (Silicone)) into the vagina and places it on the back of the baby’s head. Afterwards, palpation ensures that the extraction cup is seated correctly and that no maternal soft tissues have been pinched. The extraction cup is connected to the ATMOS S 351 NATAL via a hose. The ATMOS S 351 NATAL slowly builds up vacuum so that a negative pressure is created between the extraction cup and the head of the foetus. During the next contraction, the doctor can pull strongly on the extraction cup while the woman is pressing and help the baby out of the birth canal. After the baby’s head is born, the extraction cup is carefully removed and the rest of the delivery proceeds as in a spontaneous delivery.
What is the difference between the two vacuum extraction modes (SEMI and AUTO)?

Two vacuum extraction modes are available for vacuum extraction:

  • SEMI: The device automatically generates a base vacuum level of −20 kPa (−200 mbar; 150 mmHg). After reaching the base vacuum level, the user can check the correct positioning of the extraction cup. After confirming (by pressing the ON button for switching on automatic vacuum build-up), the device generates the desired final vacuum within the specified unit of time. Once the final vacuum has been reached, the device informs the user audibly and visually.
  • AUTO: The device automatically generates the desired final vacuum within the specified unit of time. Once the final vacuum has been reached, the device informs the user audibly and visually.
Can the ATMOS S 351 NATAL be used with a foot controller?
Yes. It should be noted that using the foot controller during vacuum extraction disables the vacuum extraction automatic mode. The vacuum is thus set and controlled by the user via the foot controller.
What do the colours on the display mean?

The colours indicate the device’s current status:

  • Blue: vacuum is being generated or released. That means that the final vacuum has not yet been reached.
  • Green: the final vacuum has been reached.
  • Red: warning message or final vacuum cannot be generated (e.g. due to leakage).
What settings can the user select in the user menu?

The following settings can be made directly by the user in the user menu:

  • Language (German, English, French, Spanish, Russian)
  • Vacuum unit (kPa, mmHg, mbar)
  • Vacuum extraction parameters (final vacuum, increase time, decrease time, mode)
  • Display brightness
  • Date and time
  • Vacuum steps


Title Date Extension Size Language
Brochures & Flyers
Brochure ATMOS Medical Suction Systems 22.03.2021 pdf 2.91 MB en, ru, cn, hu
Brochure ATMOS S 351 NATAL / ATMOS C 451 VE 22.03.2021 pdf 634.46 KB en, ru, cn, es, hu
Technical Documentation
Operating Instructions ATMOS S 351 NATAL 23.03.2021 pdf 1.77 MB en, ru, cn, es, hu
Declaration of Conformity / Konformitätserklärung Accessories Vacuum Regulation / Zubehör Vakuumregulierung 22.03.2021 pdf 66.92 KB de, en, fr, ru, cn, es, hu
Declaration of Conformity / Konformitätserklärung Vacuum extractor, foetal / Vakuumextraktor, fötal 22.03.2021 pdf 166.86 KB de, en, fr, ru, cn, es, hu
Verwendungshinweis / Note on use ATMOS Sekretbehältersystem 22.02.2021 pdf 166.85 KB de, en, fr, es


A selection of reusable extraction cups made of stainless steel and medical silicone completes the product portfolio for vacuum extraction.


Special suction hose for connecting the extraction cup to the ATMOS S 351 NATAL.

Suction curettes are used to scrape out the uterus and remove the endometrium. The special suction instruments are connected to the suction hose attached to the ATMOS S 351 NATAL and thus enable the uterine mucosa to be drained directly into the secretion canister. 

The ATMOS S 351 NATAL can be secured to a trolley for mobile use.

A hydrophobic bacterial and viral filter prevents the suction device from becoming contaminated and protects it against bacteria and viruses.


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