Patient Simulator System HST series for physical examination skills training

Lung Sound Auscultation Trainer "LSAT"

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Ideal for lung sound classification training with real lung sounds recorded from actual patients.



Japanese Patent No.3626087
US Patent No.6,527,559B2

Production Supervision:

Chiharu Yoshii, M.D., Ph.D., Assistant Professor Masamitsu Kido, M.D., Ph.D., Professor Division of Respiratory Disease, University of Occupational and Environmental Health, Japan

LSAT is a single-purpose simulator for lung sound auscultation training. Lung sound auscultation is one of the essential steps in chest examination. This skill requires three areas of expertise listening to the sounds of a patient's chest with proper use of the stethoscope, having a clear understanding of sound variations and being able to describe these sounds clearly to others. In addition, in order to give a diagnosis, relations between sounds and auscultation sites play an important role. Trainees learn not only to distinguish the sounds and their location, but to comprehensively understand what they indicate.

Last ned produktbeskrivelse (PDF)

Se video (WMV)


Outstanding sound quality

Cases are recorded from actual patients; sounds are exactly those of real patients. Computer synchronization of all outputs.

Accurate location and spread of lung sounds

15 speakers are located in the torso manikin (seven in the anterior, eight in the posterior), each speaker playing back sounds distinct to each auscultation area. Speakers are completely synchronized. The torso rotates on a base, allowing examination of both the front and back as in a real clinical procedure.

Efficient selection of the cases

Cases are carefully selected for educational purposes based on classification standards of the American Thoracic Society.

Useful explanation windows-including illustrations, chest radiographs and CT images-enhance training

Anterior area

  • 1 trachea
  • 2 upper right lung field
  • 3 upper left lung field
  • 4 middle right lung field
  • 5 middle left lung field
  • 6 lower right lung field
  • 7 lower left lung field


Posterior area

  • 0 upper left lung field
  • 1 upper right lung field
  • 2 middle right lung field
  • 3 middle left lung field
  • 4 lower left lung field
  • 5 lower right lung field
  • 6 right costophrenic angle
  • 7 left costophrenic angle


The torso model rotates on a base allowing examination of both the front and back of the chest as in actual clinical procedures.


Sounds can be monitored graphically in real time. The sound volume, the pace of respiration and the operating time are adjustable, expanding the variety of training options.


Actual stethoscopes can be used for training.
* Stethoscopes are not included in the unit.


Explanation window for each case can be referred on the monitor. General descriptions along with clinical data on individual cases including patient histories, illustrations, radiographs and CT images.


External speaker system facilitates demonstrations and group study.


LSAT can be applied to evaluating clinical skills objectively.


Teknisk informasjon

The classification of lung sounds is based on the criteria of the American Thoracic Society.

36 cases are available for training. 34 cases include 2 versions -- with and without heart-sounds
NORMAL standard FINE CRACKES both lower area
  mildly weak   both lower and middle area
  mildly strong   whole thorax 1
  mildly rapid   whole thorax 2
  loud heart sounds WHEEZES upper and middle area
ABNORMAL weak: left lower area   around trachea and upper area1
  weak: left whole area   around trachea and upper area2 (polyphone)
  absent: left RHONCHI trachea and upper area
  weak: right lower area   trachea and upper area (polyphonic)
  weak: right lower area   with an inspiratory wheeze
  absent right   whole thorax
  weak: whole thorax MISCELLANEOUS
  bronchial sounds   squawk
COARSE CRACKELS right lower area MISCELLANEOUS pleural friction rub: left lower area
  both lower area   pleural friction rub: right lower and middle area
  right middle area   Hamman's sign
  left lower area   Vocal fremitus (palpable at both sides of the chest)
  both upper area    
  whole thorax    

Components & Specifications

Component Qty Measurements Packing size Specifications
LSAT model unit 1 32 x 35 x 62H cm 51 x 46 x 80 cm 10 kg Torso with rotary base
15 built-in speakers
8 ch. amplifier
PC 1 59 x 59 x 40 cm 15 kg Windows XP, 12ch.D/A
PCI board,mouse,
112keyboard, 15"TFT monitor
*Software & data installed
Amplifier 1 32 x 35 x 8H cm 46 x 46 x 15 cm 10 kg AC 120-240V
Speakers 2 62 x 41 x 40 cm
20 kg (incl. monitor)
T-shirt 1 free size

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