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Table 4

From HTMcommunityDB.org

Ranking of the various device types according to their PM-related Failure Severity Index (combining Tables 2 and 3)

This table combines the device restoration (DR) and safety verification (SV) severity projections (contained in Table 2 and Table 3 respectively) into one single measure of failure outcome severity - that the Task Force is calling the device's PM-related Failure Severity Index (see column 5). The index has 8 levels (A though H) corresponding to the device's overall vulnerability to inadequate PM. The twenty device types listed in rows 1-20 are considered to have the highest level of vulnerability to becoming hazardous if they are subjected to inadequate PM (i.e. they are potentially high PM risk devices).

Examination of their generic PM procedures shows that all twenty have PM-related failure modes (causes of failure) associated with either the DR or SV tasks (or both) listed in their recommended PM procedures - tasks that if not completed competently or in a timely manner could cause the device to fail with the highest Level of Severity (LOS 3 = serious, life threatening). The scenarios and worst-case outcomes that might result from these possible causes of failure (failure modes) are documented separately in Table 2 and Table 3.

All 71 of the potentially PM-critical device types listed in the table below have PM-preventable failure modes and they are ranked into 8 different categories of failure severity (A through H - as indicated in column 5) according to their combined worst case levels of severity - which are indicated separately in columns 3 and 4. The combined scores in column 5 show an additional "+" for each potential adverse outcome that was ranked as serious/life-threatening (LOS 3). They are then ordered alphabetically within each ranking. The group of device types listed in rows 1 through 7 showing "A. Highest combined LOS (=6++)" in column 5 have the most severe potential consequences; and the group of device types listed in rows 67 through 71 showing "H. Lowest combined LOS (=1)" in column 5, have the least severe potential consequences.

All other device types (not included in the table) are considered to be non PM-critical devices, or more simply, non-critical devices. These are devices that cannot be made any safer by any kind of periodic, planned maintenance.

  • This table is not necessarily complete but this is a wiki site and members of the Health Technology Management (HTM) Community are invited to review the professional judgments reflected in this analysis and submit any comments, particularly any suggested changes, to the Task Force at: htmc.mptf@gmail.com


(This table was last revised on 8-21-18. Please note that the current table is still subject to further updating as the Task Force reconsiders its judgements)


2.

HTMC device type



3.

Level of Severity
of outcomes of
device restoration
failures
4.

Level of Severity
of outcomes of
hidden safety
failures
5.

PM-related Failure Severity Index

(Combined LOS of
worst-case adverse outcome
of PM-preventable
device failures)

6.

Potential
PM criticality
of device

=
Device's level of
potential PM-related risk

(LOS of worst case failure)

7.

HTMC
generic
PM procedure
code

1 AED 3 3 A. Highest combined LOS (=6++) High (LOS 3) AED-01
2 anesthesia unit 3 3 A. Highest combined LOS (=6++) High (LOS 3) ANES-01
3 critical care ventilator 3 3 A. Highest combined LOS (=6++) High (LOS 3) C.VEN-01
4 defibrillator/ monitor 3 3 A. Highest combined LOS (=6++) High (LOS 3) DEF-01
5 intra-aortic balloon pump 3 3 A. Highest combined LOS (=6++) High (LOS 3) I.A.B.P-01
6 transport incubator 3 3 A. Highest combined LOS (=6++) High (LOS 3) T.INC-01
7 transport ventilator 3 3 A. Highest combined LOS (=6++) High (LOS 3) T.VEN-01
8 apnea monitor 2 3 B. High combined LOS (=5+) High (LOS 3) APN.M-01
9 infant incubator 2 3 B. High combined LOS (=5+) High (LOS 3) IN.IN-01
10 cardiac resuscitator 3 2 B. High combined LOS (=5+) High (LOS 3) C.RES-01
11 external pacemaker 3 2 B. High combined LOS (=5+) High (LOS 3) EX.PA-01
12 heart-lung bypass unit 3 2 B. High combined LOS (=5+) High (LOS 3) H.L.BY-01
13 neonatal monitor 2 3 B. High combined LOS (=5+) High (LOS 3) NEO.M-01
14 oxygen monitor 2 3 B. High combined LOS (=5+) High (LOS 3) OXY.M-01
15 patient monitoring system 2 3 B. High combined LOS (=5+) High (LOS 3) P.M.S-01
16 linear accelerator 1 3 C. Fairly high combined LOS (=4+) High (LOS 3) LN.AC-01
17 blood pump, extracorporeal 3 0 D. Moderate-high combined LOS (=3+) High (LOS 3) BL.P.E-01
18 oxygen analyzer 0 3 D. Moderate-high combined LOS (=3+) High (LOS 3) OXY.A-01
19 PCA pump 0 3 D. Moderate-high combined LOS (=3+) High (LOS 3) INF.D-03
20 syringe pump 0 3 D. Moderate-high combined LOS (=3+) High (LOS 3) INF.D-02
21 Blood Bank refrigerator 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) RE.BB-01
22 CT scanner 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) CT-01
23 fetal monitor 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) FET.M-01
24 surgical guidance unit 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) S.GUI-01
25 surgical robot 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) S.ROB-01
26 telemetry system 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) TELE-01
27 transcutaneous O2/ CO2 monitor 2 2 E. Moderate combined LOS (=4) Moderate (LOS 2) TRA.M-01
28 brachytherapy unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) BR.TH-03
29 C-arm 1 2 F. Low combined LOS (=3) Moderate (LOS 2) C.ARM-01
30 cath lab, SP 1 2 F. Low combined LOS (=3) Moderate (LOS 2) CATH-01
31 clinical lab analyzer 1 2 F. Low combined LOS (=3) Moderate (LOS 2) C.L.A-01
32 ECG recorder 1 2 F. Low combined LOS (=3) Moderate (LOS 2) ECG.R-01
33 electrophysiology lab 1 2 F. Low combined LOS (=3) Moderate (LOS 2) EP.LB-01
34 electrosurgical unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) ESU-01
35 endoscope, specialty 1 2 F. Low combined LOS (=3) Moderate (LOS 2) ENDO-0x
36 gamma camera 1 2 F. Low combined LOS (=3) Moderate (LOS 2) G.CAM-01
37 hemodialysis unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) HEMO-01
38 hypo/ hyperthermia unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) HYPO-01
39 infant warmer 1 2 F. Low combined LOS (=3) Moderate (LOS 2) IN.WA-01
40 mammo unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) MAMO-01
41 MRI scanner 1 2 F. Low combined LOS (=3) Moderate (LOS 2) MRI-01
42 opthalmic laser 1 2 F. Low combined LOS (=3) Moderate (LOS 2) O.LAS-01
43 peritoneal dialysis unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) P.DIA-01
44 PET scanner 1 2 F. Low combined LOS (=3) Moderate (LOS 2) PET-01
45 PET/ CT scanner 1 2 F. Low combined LOS (=3) Moderate (LOS 2) P.CT-01
46 PET/ MRI scanner 1 2 F. Low combined LOS (=3) Moderate (LOS 2) P.MR-01
47 special procedures room 1 2 F. Low combined LOS (=3) Moderate (LOS 2) S.PRO-01
48 sterilizer 1 2 F. Low combined LOS (=3) Moderate (LOS 2) STER-01
49 surgical laser 1 2 F. Low combined LOS (=3) Moderate (LOS 2) S.LAS-01
50 thyroid uptake unit 1 2 F. Low combined LOS (=3) Moderate (LOS 2) TH.UP-01
51 tomo room 1 2 F. Low combined LOS (=3) Moderate (LOS 2) TOMO--01
52 xenon scintigraphy system 1 2 F. Low combined LOS (=3) Moderate (LOS 2) XE.SC-01
53 blood gas analyzer 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) BL.G.A-01
54 blood pressure monitor (invasive) 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) BP.M-01
55 blood warmer 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) BL.WA-01
56 bone densitometer 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) B.DEN-01
57 EEG recorder 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) EEG.R-01
58 infusion pump 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) INF.D-01
59 lab microscope 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) L.MIC-01
60 phototherapy light 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) PH.LI-01
61 portable x-ray unit 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) PORT-01
62 R&F room 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) R&F-01
63 rad room 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) RAD-01
64 radiation dosimeter 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) R.DOS-01
65 radioisotope calibrator 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) R.CAL-01
66 ultrasound scanner 0 2 G. Very low combined LOS (=2) Moderate (LOS 2) ULTR-01
67 cataract extraction unit 1 0 H. Lowest combined LOS (=1) Low (LOS 1) CAT.X-01
68 contrast injector 1 0 H. Lowest combined LOS (=1) Low (LOS 1) C.INJ-01
69 infant scale 0 1 H. Lowest combined LOS (=1) Low (LOS 1) IN.SC-01
70 OR light 1 0 H. Lowest combined LOS (=1) Low (LOS 1) OR.LI-01
71 ventilator 1 0 H. Lowest combined LOS (=1) Low (LOS 1) VENT-01
72 autotransfusion unit 0 0 Non-critical Negligible (LOS 0) AU.TR-01
73 hemodialysis blood pump 0 0 Non-critical Negligible (LOS 0) HE.B.P.-01
74 exercise ergometer 0 0 Non-critical Negligible (LOS 0) EX.ER-01
75 pulse oximeter 0 0 Non-critical Negligible (LOS 0) P.OX-01
76 vital signs monitor 0 0 Non-critical Negligible (LOS 0) VS.M-01
etc. etc. 0 0 Non-critical Negligible (LOS 0) ETC-01


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