Review for 10.1186/s12876-022-02336-4 (2022)

Reviewer’s report
Title: 
Retrograde Coiled Spring Jejunal Intussusception in an Infant due to Foley
Catheter Gastrostomy: A Case Report
Version: 
0 
Date: 
07 May 2021
Reviewer: 
Michael Pak-Kai Wong
Reviewer's report:
Thank you for the manuscript of this interesting case report. Below are several
comments and suggestions: 
Page 2 Line 24 unite 
Typing error, I think the author meant unit
Page 3 Line 55
Citation format error
Page 3 Line 57
Citation format error
Page 5 Line 103 An
Typing error, I think the author meant "A"
Page 5 Line 104 Regarding Fig. 3
Need to label with an arrow. There are many tubes visible on the AXR. It can be
confusing for the readers.
Page 5 
Line 106-107 serum saline enema
This may be another typing error. Does the author refer to saline enema? 
Page 5 Line 110
Coiled Spring Sign is a fluoroscopic or contrast imaging denoting
intussusception. It is not a specific type of jejunal intussusception. The Coiled
spring sign are visible with bowel contrast study. Suggestion to the author may
consider adding the radiological image with appropriate marker to demonstrate
this coiled spring sign.
Page 5 Line 113 Regarding Fig. 4
The image shown clearly the dilated small bowel arranged in spiral apperance.
However, the site of intussusception are not clearly visualised. Perhaps, the
authors could use the marker to indicate the sites of the intussusceptions as
stated in their manuscript.
Page 5 Line 115 After waiting long enough….
This is a subjective description. Perhaps the authors could explain what they
meant by after waiting long enough. Suggestion: the author may consider
explaining what was actively done for bowel resuscitation during the period of
observation for improvement of the intestinal circulation.
Page 5 Line 124 Discussion and conclusions
The discussion and conclusion should be in separate subheadings
Page 7 Line 153-154
Please provide references to this statement.
Page 7 Line 156-157
This statement appears fragmented, suggest for revision.
Page 7 Line 162-163
The coiled spring sign in intussusception refer to the contrast study - the
appearance occurs when the contrast reflux within the lumen between the
intussusceptum and intussuscipiens.
The author may have misunderstood the sign. However, the author may highlight
on the multiple intussusceptions in one segment of bowel which is an interesting
phenomenon in this case report.
Page 7 Line 167-168
In the references 11-13, the original author did not mention about "coiled spring"
intussusception. However, they mentioned clearly that it was a retrograde
intussusception.
Page 8 Line 184-185
The author described the abdominal examination of the patient. However, a
citation was added at the end of this statement with unclear intention.
The statement of mild abdomen distension and normal bowel sounds with the
ileus is very contradicting. Suggest revising this statement.
Page 9 Line 208-209 A coiled spring intussusception….
Perhaps the author refer to the multiple retrograde intussusception rather than
coiled spring intussusception. This is to avoid confusion to the reader.
Page 10 Line 244 tub
Typing error - tube
Page 10 Line 244 an external bolster 
The author may be referring to "external bumper" on the standard gastrostomy
tube.
If the authors wish to make a recommendation, perhaps a recommendation of
prompt change to a proper gastrostomy tube would be more appropriate. The use
of Foley's catheter is a temporary measure while waiting for the proper
gastrostomy tube replacements.
If the authors wish to make an innovative recommendation, perhaps an example
of the innovation "external bolster or ring" which was stated with pictorial
illustration would be helpful. 
Page 11 Line 269-271
The Foley's catheter is commonly use as a temporary placement to avoid
spontaneous closure of the gastrostomy site when accidental dislodged of the
gastrostomy occur. This is still relevant and useful especially if the patient
presented to the district hospital where the gastrostomy tubes are not easily
available. It was never meant to be permanent usage. There are many different
types of gastrostomy tubes available on the market. It should be replaced as soon
as the gastrostomy tube is available.
This statement is confusing. Suggest to revise or remove if appropriate.
Page 12 Line 274-275
Suggest to use retrograde intussusception and not to use "coiled spring" which
could be misleading to the readers.
Figure 1 - 6
Please add captions and also label the appropriate part with the
markers/indicators. This will ease the reader to appreciate the highlight of your
case.
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
presented?
Yes
Are the methods sufficiently described to allow the study to be repeated?
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Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
Yes