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Table 6 Complete summary of all microscopy measurements made on restrictors 3D printed for consideration in this study

From: A computational fluid dynamics assessment of 3D printed ventilator splitters and restrictors for differential multi-patient ventilation

Manufacturer/Model

Type

Material

Layer thickness

Nominal I.D.

True I.D.

 

I.D. error to layer thickness ratio

 
     

Mean

Peak-peak variation

Mean

Peak-peak variation

(a) Creality LD-002R

Consumer SLA

Monocure 3D

50 µm

2.0 mm

1.69

0.06

2.4

1.0

  

Rapid transparent

 

3.0 mm

2.60

0.13

8.0

2.6

  

photopolymer resin

 

4.0 mm

3.48

0.17

10.4

3.4

(b) Prusa i3 Mk3S

Consumer FDM

PLA

50 µm

2.0 mm

1.87

0.04

3.0

0.8

    

3.0 mm

2.86

0.05

2.85

1.04

    

4.0 mm

3.90

0.13

2.05

2.56

(c) Prusa i3 Mk3S

Consumer FDM

PLA

100 µm

2.0 mm

1.94

0.12

1.2

1.20

    

3.0 mm

2.95

0.06

0.55

0.55

    

4.0 mm

3.99

0.16

0.15

1.55

(d) Prusa i3 Mk3S

Consumer FDM

PLA

200 µm

2.0 mm

1.92

0.15

0.8

0.80

    

3.0 mm

2.84

0.03

0.81

0.16

    

4.0 mm

3.86

0.03

0.69

0.16

(e) Stratasys uPrint

Professional FDM

ABS

254 µm

2.0 mm

1.38

0.14

2.8

0.60

    

3.0 mm

2.81

0.03

0.73

0.10

    

4.0 mm

3.84

0.09

0.63

0.35

(f) Stratasys Connex500

Professional PolyJet

Vero White Plus

32 µm

2.0 mm

1.74

0.27

8.3

8.4

  

acrylate

 

3.0 mm

2.24

0.11

3.4

13.4

  

photopolymer

 

4.0 mm

3.63

0.37

11.6

11.6

(g) Markforged Mark 2

Professional FDM

Nylon-cabon

100 µm

2.0 mm

1.78

0.28

3.6

2.8

  

fibre

 

3.0 mm

2.91

0.10

0.87

0.95

  

composite

 

4.0 mm

3.86

0.05

1.36

0.45

(h) Formlabs Form 2

Pro-sumer SLA

Surgical

50 µm

2.0 mm

1.73

0.06

12

2.4

  

guide

 

3.0 mm

2.93

0.03

1.32

0.6

  

resin

 

4.0 mm

3.91

0.05

1.77

0.94

  1. Values are the average of multiple measurements made at the entry, mid-plane and exit of the restrictions for all replicate parts