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Table 1 Summary of parameters for USCM BBB opening

From: Ultrasound-assisted brain delivery of nanomedicines for brain tumor therapy: advance and prospect

Carrier system

Types of ultrasound

Parameters of ultrasound

Mechanism

Duration (min)

Refs

Frequency (MHz)

Sound pressure (MPa)

Pulse length (ms)

PRF (Hz)

BCNU bubbles

pFUS

10

0.5–4.5

–

10

Cavitation effect

4

[42]

DOX-SPIO-MBs

pFUS

0.4

0.325

–

1

Cavitation effect

1.5

[43]

PFP nanodroplets

pFUS

1.5

0.45; 0.60

6.7

5

Cavitation effect

5

[44]

PEG-PLGA-PFP nanodroplets

cFUS

1

1.0

–

–

Thermal effect;

cavitation effect

3

[45]

Nanobubbles

pFUS

0.75 ± 0.05

 < 0.5

10

1

Cavitation effect

0.5

[46]

–

LIFUP

1

0.3

–

1

Cavitation effect

2

[47]

Propofol-loaded nanoemulsions

pFUS

1

0.5

10

0.5

Cavitation effect

2

[48]

–

pFUS

0.69

0.6–0.8

10

1

Cavitation effect

1

[49]

AP-1 Lipo-Dox

HIFUS

1

0.7

–

1

Cavitation effect

–

[50]

CDDP-BPN nanoparticles

cFUS

1.14

0.8

–

–

Cavitation effect

–

[51]

The liposomal (LP)-O.6BTG-C18 nanoparticles

LIFUP

–

0.28–0.55

10

1

Cavitation effect

3

[52]

BCNU-MBs

pFUS

1

0.5

5

5

Cavitation effect

2

[53]

GDNFp-liposome

pFUS

0.5

0.33

10

1

Cavitation effect

0.5

[54]

MBs

pFUS

0.612

0.55–0.81

10

1

Cavitation effect

1

[55]

Albumin-based nanoclusters

pFUS

1.1

0.30

10

1

Cavitation effect

2

[56]

  1. Abbreviations: pFUS, pulsed focused ultrasound; PRF, pulse repetition frequency; LIFUP/HIFUP, low-intensity/ high-intensity focused ultrasound pulses; cFUS, continuous focused ultrasound