Introduction
Uterine fibroids and adenomyosis are two
commonly gynecological benign tumors
negatively affected women’s health [1,2].
High-intensity focused ultrasound (HIFU)
is a promisingly alternative treatment to
conventional surgery and is increasingly
worldwide used because of its completely
non-invasive method [3-6]. During the
ablation procedure, appearance of bowel loops
inside the treatment window was generally
problematic because hard elements and air
bubbles inside bowel loops absorb and reflect
ultrasound energy caused unpredictable
thermal injury even bowel perforation [7,8].
Thus, in this concise communication, we aimed
to introduce the filling bladder, filling rectum,
and emptying bladder (BRB) technique for
manipulating bowel loops out of the treatment
Appearance of bowel loops in the sonication beam path during high-intensity focused ultrasound (HIFU) ablation therapy is a
problematic condition. Filling bladder, filling rectum and, emptying bladder (BRB) maneuver technique might be helpful in producing
a non-bowel treatment window for HIFU ablation of uterine fibroids and adenomyosis and ensuring the safety profile for patients.
Keywords
high-intensity focused ultrasound uterine fibroids adenomyosis BRB maneuver technique
Nguyen Minh Duc* &
Huynh Quang Huy
Department of Radiology, Pham Ngoc
Thach University of Medicine, Ho Chi
Minh city, Vietnam
*Author for correspondence:
[email protected]
Figure 1. (A) Sagittal T2W images show adenomyosis on the posterior wall of
the anteverted uterus (white asterisk) with bowel loops above the tumor (blue
arrow), which tend to move into the space between the tumor and abdominal
wall (red arrow). (B) Filling bladder with 400 ml normal saline (black asterisk)
generates bowel loops out of the treatment window (orange arrow).
window in order to establish the safety profile
for patients.
BRB technique
Filling the bladder with normal saline via a
Foley catheter will not only elevate the uterus
upward but also shove the bowel loops out of
the treatment window when they tend to move
into the space between the abdominal wall and
the uterus as seen in Figure 1 [9,10].
Filling the rectum with ultrasound gel
through a rectal catheter is also beneficial
for pressing the uterus forward and reducing
the distance between the uterus and anterior
abdominal wall as seen in Figure 2. In addition,
this manipulation also reduces bowel loop
movements into the space between the uterus
and the rectum [9,10].
Finally, emptying bladder concurrent with
SHORT COMMUNICATION
a rectum full of ultrasound gel is predicted to
produce a non-bowel treatment window as
seen in Figure 3 [9,10]. In some circumstances,
after emptying bladder, the bowel loops tend
to relocate into the treatment window; thus,
refilling the bladder with normal saline and
keeping the bladder dilated during the treatment
process should be considered. Kim et al. [10]
stated that the most significant factor affected to
the unsuccessful rate of BRB technique was the
small size of uterus.
Conclusion
The BRB maneuver technique plays an
important role in generating a non-bowel
treatment window for HIFU ablation of uterine
fibroids and adenomyosis.
Disclosure statement
Conflict of interest: The authors of this
manuscript report no conflict of interest.
Figure 2. (A) Sagittal T2W images show the uterine fibroid on the anterior
wall of the retroverted uterus (white asterisk) with bowel loops above the
tumor (blue arrow) which tend to move into the space between the tumor and
abdominal wall (red arrow). (B) Filling rectum with 150 ml ultrasound gel (blue
asterisk) generates upward and forward uterine movements, shrinks the space
between the tumor and abdominal wall (green arrow), and bowel loops out of the
treatment window (orange arrow).
Figure 3. (A) Sagittal T2W images show the focal adenomyosis on the posterior
wall of the anteverted uterus (white asterisk) with bowel loops above the
tumor (red arrow). (B) Filling bladder with 300 ml normal saline (black asterisk)
and filling rectum with 150 ml ultrasound gel (blue asterisk) generate uterus move
upward and forward. (C) Emptying bladder meanwhile with the pressure of filled
rectum makes the uterus move forward and downward and bowel loops out of the
treatment window (blue arrow).
Imaging Med. (2018) 10(2)30
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Imaging Med. (2018) 10(2) 31
High-intensity focused ultrasound of uterine fibroids and adenomyosis: maneuver
technique for bowel loops located inside the treatment window