A Moreira Grecco y cols. Angiograꢁa fluorescente en la cirugía colorrectal. Rev Argent Cirug 2020;112(4):508-516
515
recent and comparable historical control, Boni found
Our series showed an AL rate of 5.41% (2
no signiꢄcant difference with FA in 42 paꢁents; it is cases), a value that compares to those from other
noteworthy, however, that there were 2 paꢁents with series, such as the ones menꢁoned above. Considering
AL in the control group, but the resecꢁon site was that the aim of this study was to assess the technical
changed in the FA group and there were no cases of possibility and its impact on the change of surgical
1
0
AL . In this group, 4.7% of the resecꢁon site changes strategy, no control group was deꢄned in terms of the
resulted in the absence of leaks. Kudszus reported a incidence of AL without using FA. However, we believe
3
7
.5% AL risk reducꢁon in the FA group, as opposed to it is important to discuss this point because it is the
11
.5% in the control group without FA . A systemaꢁc major impact factor of FA.
review on the value of the analysis of anastomoꢁc
While FA offers us the possibility of real-
perfusion with ꢂuorescence highlighted the difference ꢁme assessment of adequate intesꢁnal perfusion,
between FA groups and the control groups, the average it presents a degree of subjecꢁvity when assessing
1
2
AL being 3.83% and 7.58%, respecꢁvely . A subject- the intensity of the ꢂuorescence signal on the video
matched study showed a 6% reducꢁon in the incidence screen. On the other hand, there are variaꢁons in the
of AL with the use of FA, being the rate of AL in the colors and the intensity of the video signal depending
FA group 8.8%, and 14.7% in the control group .A on the manufacturers; there are also technical factors
systemaꢁc review and meta-analysis concluded that such as the ICG dose, ICG injecꢁon or perfusion speed,
the use of FA reduces the risk of AL with an odds raꢁo distance from the source and camera to the intesꢁne,
1
3
1
4
of 0.51 . It follows from this analysis that the value of quality of the ꢄber opꢁc cable, intensity of the infrared
FA increases in oncological resecꢁon, and leꢇ colon light and characterisꢁcs of the paꢁents –such as blood
–
parꢁcularly rectum– where AL reducꢁon would be pressure, arteriosclerosis and BMI– that may inꢂuence
8
1% when ICG-FA is used (OR 0.19). Another meta- the intensity of the signal. To solve this issue, systems
analysis that only included colorectal cancer surgeries for quanꢁfying ꢂuorescence are under development.
also showed reduced risk for AL in paꢁents undergoing Fluorescence emission curves at the level of the
1
7
ICG-FA, changing the anastomoꢁc site in 4.7-19% of the intesꢁnal wall have been described . These curves
cases, with an incidence of AL being lower, staꢁsꢁcally would classify paꢁents into risk groups for anastomosis
1
5
signiꢄcant, with no bias . This meta-analysis concludes and eliminate the subjecꢁvity of the video assessment
that ICG-FA is associated with a lower AL rate aꢇer by replacing it with standardized numerical values.
colorectal resecꢁon. Those results were validated by a
Some disadvantages in our report include
third meta-analysis, which conꢄrmed the results of the the number of parꢁcipants, the heterogeneity of
previous analyses with a risk reducꢁon of 12% for AL. surgeries performed, and the lack of a control group to
[
15] A recent randomized trial evaluaꢁng the reducꢁon compare the incidence of AL. Strengths include being a
of AL rate in colorectal surgery showed no difference prospecꢁvereportandtheꢄrstinthenaꢁonalliterature.
1
6
between the treatment groups . The trial involved
52 paꢁents randomized 1:1 to white-light perfusion
2
assessment or to ICG-FA. The primary aim was to Conclusions
assess whether ICG-FA could lead to a reducꢁon in AL
rate. Secondary outcomes were possible changes in
Indocyanine-green ꢂuorescent angiography
the surgical strategy. A change in surgical strategy was in colorectal surgery was feasible, adding minimal
reported in 13 paꢁents (11%): 11 (9%) AL in the white- complexity and ꢁme to the tradiꢁonal procedure and
light group and 6 (5%) in the FA group; this difference resulꢁnginchangeofstrategyfortheintesꢁnalresecꢁon
was not staꢁsꢁcally signiꢄcant.
in 11% of cases, with a low rate of anastomoꢁc leak.
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