Stephan Ventilator ABV Service manual V1.1

Ventilator ABV – A - U

RESPIRATO R EIN / AUS

A T E M Z E I T V E R H Ä L T N I S								MAX.DRUCK
	I N S P . :			E X S P .				6 0	mbar 1 0
								5 5	1 5
							IPPV	5 0	2 0
1 :	4			2	:	1		4 5	2 5
								4 0 3 5 3 0
1	: 3
				1,	5	:	1	M IN . D R U C K
1		1: 2 :		1 1 : ,	1 5			2 5	m b a r
						2	m in		5
								2 0	1 0
6				6	0				1 5
								S E N S IT IV I T Ä T
7				5 0
									P m b a r
8				4 0
9				3	0
1 0
				2 5
1		2
	1		4	2 0
		1		6

M A N U A L E X P IR A T IO N (m b aINr) S P IR A T IO N (m b a r)
M A N U E L L R E S P IR A T O R
m a x .	m in .m a x .	m in .
	m b a r

Service Manual

. STEPHAN GmbH · Medizintechnik · D-56412 Gackenbach · Kirchstr. 19 · Tel. [phone] · Fax [phone] · [e-mail] · www.stephan-gmbh.com

ABV – A - U		Service - Manual	Page 2
	Contens
1. DESCRIPTION OF CONSTRUCTION AND FUNCTION			4
1.1	Complete scheme		4
1.2	Respirator with patient unit		5
Only ABV-U			5
1.3	Adjustment of parameters at the respirator		6
1.3.1 Change of inspiration flow at the flow-control valve			6
1.3.2 Frequency adjustment			6
1.3.3 Breathing/time ratio (inspiration/expiration)			6
1.3.4 Pressure monitor			6
1.3.5 Control limit-value IPPB			7
1.4 Patient component ABV-A			8
1.4.1 PEEP-adjustment			8
1.4.2 PLATEAU adjustment			8
1.4.3 Change lever		Respirator / manual	8
1.4.4 Ejektor / GAS EVAC			8
1.5	Patient unit for paediatric respiration		8
2. FUNCTION SCHEME			9
2.1	Technical course of events during inspiration		9
2.2	Technical course of events during expiration		10
3. SERVICING OF BASIC APPARATUS			11
3.1	Electronic		11
3.2	Pneumatic		12
4. SIGHT CHECK			12
5. PERFORMANCE CHECK			12
5.1	Self-test of respirator		12
5.2	Errorcodes / Operation - Display		13
5.3. Operating mode CMV			13
5.4 Operating mode IPPV			14
5.5	Pressure alarms		14

6. CHECK OF ELECTRICAL SAFETY (STK)	15
7. PATIENT UNIT ABV-A	16

ABV – A - U		Service - Manual	Page 3
8. CLEANING & STERILISATION			17
8.1	Ventilator ABV-A		17
8.2	Patient unit		17
9. ERROR-FLOW DIAGRAM			19
9.1	Respirator		19
9.2	Pressure monitor		19
10. SPECIFICATION SHEET			20
10.1 Ventilator module ABV - A			20
10.2 Patient component			21
11. SPARE - PART - LIST			22
12. MAINTENANCE			23

ABV – A - U	Service - Manual	Page 4

1. Description of construction and function

1.1 Complete scheme

The respirator module is equipped with a pneumatic and with an electronic control unit (respirator ABV-A and patient unit), and with an electronic control monitor for breathing pressure.

The electronic of the respirator module is supplied with line voltage (230V/50 c.p.s.), while the pneumatic unit requires a propellant gas in form of compressed air (3 - 5 bar). The respirator ABV-A is designed for the anaesthesia respiration of children and adults in a semiclosed system.

The patient unit can be exchanged quickly due to its quick-release fastener and meets the highest requirements for hygiene because of its easy dismountability (partly autoclavable with a temperature of up to 134°C).

General description

The respirator ABV-A has to be supplied with compressed air as propellant gas with a pressure of 3 - 5 bar (1). The various respiration parameters can be adjusted at the respirator:

	A T E M Z E I T V E R H Ä L T N I S								MAX.DRUCK
		I N S P . :			E X S P .				6 0	mbar 1 0
									5 5	1 5
									5 0	2 0
RESPIRATO R	1 :	4						IPPV	4 5	2 5
EIN / AUS					2	:	1		4 0 3 5 3 0
	1	: 3			1,	5	:	1	M IN .D R U C K
	1		1: 2 :		1 1 : ,	1 5			2 5	m b a r
5							2	m in		5
									2 0	1 0
	6				6	0				1 5
	7				5 0				S E N S IT IV IT Ä T
										P m b a r
	8				4 0
	9				3	0
	1 0
					2 5
	1		2
		1		4	2 0
			1		6

	M A N U A L E X P IR A T IO N (m b aINr) S P IR A T IO N (m b a r)
	M A N U E L L R E S P IR A T O R	m b a r		3	2	4
	m a x .		m in .
		m in .m a x .
				7

6

-breathing/time ratio (2)

-frequency (3)

-Min. / Max. Pressure / Sensitivity(4)

-volume (5)

-PEEP (6)

-PLATEAU (7)

ABV – A - U	Service - Manual	Page 5

1.2 Respirator with patient unit

The respirator ABV-A is designed for controlled anaesthesia respiration with state-of-the-art technology.

The respirator works in a pressure-gas driven, timed and volume-constant way, with the possibility to limitate the inspiration pressure at the patient unit.

The patient unit is designed according to the "bag-in-bottle-principle", thus achieving a separation of breathing gas and control gas. In addition, the patient unit serves as reservoir.

1				A T E M Z E I T V E R H Ä L T N I S								MAX.DRUCK			On	the	upper		left	side		of	the
					I N S P . :			E X S P .				6 0 mbar	1 0
												5 5	1 5	6	respirator You find the ON/OFF-
												5 0	2 0
	RESPIRATO R			1 :	4			2	:	1	IPPV	4 5	2 5
	EIN / A US											4 0 3 5 3 0
				1	: 3			1,	5	:	1	M IN .D R U C K			switch (1).
				1	1: 2 :			1 1 : , 1 5				m b a r
										2	m in	2 5	5	7
												2 0	1 0
				6				6	0			1 5			Directly		below		You		find		the
2				7				5 0				S E N S IT IV IT Ä T
												P m b a r
				8				4 0						12
				9				3	0						flow-control valve (2), where the
				1 0
				1	1 2		4	2 5
								2 0
						1		6
	M A N U A L E X P IR AT IO N (m b aINr) S P IR A T IO N (m b a r)														volume		flowing		to	the	patient's
	M A N U E L L R E S P IR A T O R			3						4		8			lungs during inspiration can be
	m a x .	m in .m a x .	m in .
		m b a r
															dosified.
									5						The number of respiration cycles
															can be varied from 6 to 60
															breaths per minute at the
				11											potentiometer				"frequency"(3),
				10											while the ratio of inspiration and
															expiration			can	be	preselected
				9											from 1 : 4 to 2 : 1 with the switch
															"breathing/time ratio"(4).
															An	excess-pressure						proof
															respiration			manometer					(5)
															indicates the pressure in the
															system within a range from -10 -
															60 millibar. The patient pressure
can be controlled by setting of pressure alarm limits . Max.-pressure (6) and min.- pressure
(7) can be varied with			potentiometers. In the case of exceeding the alarmlimits an optical
and visual (8) alarm is released.
In the event of a power outage, an									acoustic signal					sets off a warning for at least 30 sec. With
the change lever (9) of the patient unit, either respirator respiration or manual respiration can
be selected.
The PEEP-valve (10) serves to increase the pressure at the end of expiration to a maximum of
10 millibar. With the use of the plateau valve (11), You achieve a respiration with a constant
upper pressure limited to a maximum of 60 millibar.

Only ABV-U

The respirator ABV-U can support spontaneouse ventilation of a patient. For that reasons is an additional membran key („assist.-control“) on the frontplate. The trigger sensitivity can be adjusted with the potentiometer „Sensitivity“ (12).

ABV – A - U	Service - Manual	Page 6

1.3 Adjustment of parameters at the respirator

1.3.1 Change of inspiration flow at the flow-control valve

In principle, it is possible to vary the inspiration flow at the flow-control valve in order to reach a tidal volume of 0 - 1500 ml. In relation with the plateau pressure however, certain respiration curves can be generated.

1.3.2 Frequency adjustment

The frequency (breaths per minute) can be adjusted for values between 6 and 60 breaths per minute.

When adjusting the frequency, take into account, that with an increased frequency the breath minute-volume remains constant, but that the tidal volume will be reduced.

1.3.3 Breathing/time ratio (inspiration/expiration)

The breathing/time ratio, the ratio of inspiration and expiration, can be preselected from 1 : 4 to 2 : 1 as the case might require, without influencing the respiration frequency.

1.3.4 Pressure monitor

The pressure monitor is an electronic module separated in two pressure-measurement ranges, for the continuous control of the pressure the patient is subject to. The patientpressure is also shown on the pressuregauge in the frontpanel of the ventilator.

Maximum pressure

The pressure-measurement range for the maximum pressure has a potentiometer which is to be used to smoothly adjust the upper respiration-pressure limit for values between 6 and 60 millibar.

In the event, that the pressure for the patient exceeds the adjusted maximum pressure, the pressure monitor sets off an optical and acoustic alarm until this pressure is no longer exceeded.

Minimum pressureor disconnection unit

The pressure-measurement range for the minimum pressure has a potentiometer, which is to be used to smoothly adjust the minimum respiration-pressure limit-value for values between 5 and 25 millibar.

During one respiration cycle, the adjusted minimum-pressure limit-value has to be exceeded once and fallen short of once, if this is not the case, an optical and acoustic alarm is set off.

Flashing red: minimum-limit pressure-value permanently exceeded (Stenosis or PEEP to high), or value permanently not reached (disconnection).

In the event of an existing disconnection inside the system followed by a considerable pressure drop, the disconnection warning is set off with a delay of 15 seconds.

ABV – A - U	Service - Manual	Page 7

By pressing the STAND-BY foil button of the pressure monitor, the acoustic alarm can be suppressed for 2 minutes.

The pressure monitor is to be set in operation with the operating switch of the respirator.

In case of an artificial respiration without the respirator, the pressure monitor is not working.

1.3.5 Control limit-value IPPB

As an option, with this respirator model a pressure-controlled respiration (IPPB) can be carried out. For this kind of artificial respiration, expiration is induced when a preselected maximum pressure is reached.

For this purpose, the excess-pressure limit value of the integrated pressure monitor serves as pressure control.

The next inspiration cycle then will be set off by the time determined by the frequency.

Respirator "ABV-U"

In order to be able to work more successful in cases where the spontaneous respiration of the patient has not yet failed completely or is showing signs of coming back, we offer a "ABV-U" put-in respirator with integrated pressure monitor for assisted/controlled or pressurecontrolled respiration.

Caused by the inspiration efforts of the patient, a below atmospheric pressure is generated inside the system, causing the respirator to carry out an additional and completely controlled respiration lift in accordance with the preselected respiration parameters.

In the event, that the spontaneous respiration of the patient ceases completely, the respiration frequency will be reduced to the preselected values and controlled respiration will be continued automatically.

The suction, that has to be generated by the patient to trigger respiration in this mode, can be varied with a sensitivity of 0.2 - 2 millibar of pressure difference at the adjusting knob for sensitivity.

In the event, that the respirator is operated with a positive pressure at the end of expiration, the trigger level is adapted to this value automatically.