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INFUSION PUMPS ผศ. ต่อตระกูล อภัยวงศ์
โครงการวิจัยและพัฒนาอุปกรณ์ชีวการแพทย์ มหาวิทยาลัย มหิดล
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รายละเอียดในการบรรยาย
1. Downstream Occlusion Alarm 2. Infusion pump performance 3. Free-flow protection
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โครงสร้างการทำงาน Downstream Occlusion Upstream Occlusion Alarm
Occlusion Detection Pressure Increments Alarm Downstream Occlusion Upstream Occlusion
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Occlusion
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1. Interruption to therapy 2. Ineffective therapy
Occlusion 1. Interruption to therapy 2. Ineffective therapy 3. A potential sudden injection of unwanted bolus, on release of the occlusion.
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Adjustable downstream occlusion pressure
BAXTER Colleague Adjustable downstream occlusion pressure PSIG Rate Occlusion Alarm Time to Bolus Pressure Setting Alarm Volume 1mL/hr psig – 8 min – 0.16 mL 9 psig – 27 min – 0.26 mL
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เวลาที่เตือนหลังจากการอุดตัน เครื่อง ARCOMED AG mVP5005
Rate Pressure Pressure (ml / h) ( 2.5 bar ) ( 500 mbar ) >120 min min min sec sec sec sec sec Bolus ml ml
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Occlusion การตั้งระดับสัญญาณเตือนการอุดตัน ไว้ที่ระดับต่ำ ทำให้สามารถทราบการ อุดตันได้เร็วขึ้น และปริมาตรที่ปล่อยออกสู่ผู้ป่วยหลังจากการอุดตันมีขนาดลดลง
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Is this the volume or flowrate accuracy ?
Most intravenous infusion pumps are specified to deliver within +/- 5 % Is this the volume or flowrate accuracy ?
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FLOW ACCURACY Most intravenous infusion pumps are specified to deliver within 5 % of flow setting , 10 % is acceptable for most applications ; for critical applications, the error should not exceed 5 % Inspection and Preventive Maintenance System ECRI . All Rights Reserved.
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AIR BUBBLE
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BAXTER Colleague Air detection Sen. (25 - 150mL) 25 mL 0.83 mL
Air Bubble Accumulation Setting Volume 25 mL mL 50 mL mL 100 mL mL 150 mL mL
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Infusion pump performance parameters
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B A C Infusion pump performance parameters
Good long term accuracy Alarm after occlusion Small occlusion bolus Able to detect small air embolus Small flow rate increments Bolus accuracy B A Good long term accuracy Good short term accuracy Rapid alarm after occlusion Small occlusion bolus Able to detect very small air embolus Small flow rate increments Good bolus accuracy Long term accuracy Alarm after occlusion Small occlusion bolus Able to detect small air embolus Increments flow rate C
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B C A START is the patient a neonate ? N N Is a drug being delivered ?
Y Y The drug have a short half life or narrow therapeutic index ? N Is the drug diamorphine ? Is the patient volume sensitive ? Y Y Y N N B C A
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free flow protection
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In the early 1990s First reported in the early 1990s by ISMP and the ECRI Institute , accidental, uncontrolled free-flow of IV solutions after removal of administration sets from infusion pumps was recognized as a serious problem that led to death and patient injury - 22k -
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In September 1992 ECRI , issued a recommendation against purchasing any infusion device that dose not have a free flow protection built in to the administration sets
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In 1994 FDA published an advisory with its own suggestions for preventing infusion-related errors.
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In November 2000 JCAHO released a Sentinel Event Alert on infusion pump risks, noting that at least six deaths because of free-flow accidents.
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2003 JCAHO National Patient Safety Goals:
Goal 5 : Improve the safety of infusion pumps Ensure free-flow protection on all general-use and PCA intravenous infusion pumps used in organization.
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2003 JCAHO National Patient Safety Goals:
Free-flow protection refer to a design in which the protection is built in to the administration set used with the pump
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Infusion Pump Requirement Dropped from 2006 JCAHO National Patient Safety Goals:
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To test free flow protection
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IV set primed
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Infusion pump turn off Loaded in the infusion pump
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All the tubing clamps are opened
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No fluid flows out of the set
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Then removed the set from the device ( with all the tubing clamps still open )
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ECRI Health Devices Inspection and Preventive Maintenance System
.....no fluid flows out of the set ECRI Health Devices Inspection and Preventive Maintenance System
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To avoid freeflow, fallow the manufacture’s recommendations and, whenever possible,count the drops in the drop chamber, to check the drip rate , before leaving the patient.
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เอกสารอ้างอิง 1. MDA : Medical Device Agency , Infusion Systems MDA DB 2003 ( 02 ) March Health Devices Inspection and Preventive Maintenance System , ECRI BAXTER Operator’s manual Colleague Volumetric Infusion Pump; 1996 – 2000 4. Environment of Care® News, November 2005, Volume 8, Issue 11 Copyright 2005 Joint Commission on Accreditation of Healthcare Organizations
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