1
|
Tan P, Laframboise J, Barr K, Anvari H, Ungi T, Fichtinger G, Scott C, Bechara R, Hookey L. A158 LACK OF DIFFERENCE OF COLONIC CURVATURE IN SUPINE VERSUS PRONE PATIENT POSITIONS, IN NORMAL AND HIGH BMI INDIVIDUALS, AS ASSESSED BY QUANTITATIVE ASSESSMENT OF COMPUTED TOMOGRAPHY COLONOGRAPHY. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Dynamic positional changes during colonoscopy are commonly used in clinical practice, in particular moving from side to side. It has been shown to improve both adenoma detection rates as well as cecal intubation times. However, perhaps due to an additional level of inconvenience, there have been few studies comparing the anatomy and changes in colonic curvature when patients are in the prone position, which may help to prevent anterior bowing of the scope, particularly in patients with high body mass index (BMI).
Aims
To compare both the number of colonic curves and degree of change in curves with patients in supine versus prone positioning during computed tomography colonography (CTC).
Methods
75 CTC studies, obtained between January and April 2017 at Hotel Dieu Hospital in Kingston, Ontario, were screened and included based on image quality and adequacy of distention. Per standardized protocol, all patients undergoing CTC are imaged both in supine and prone positioning. Using an automated computer algorithm process developed for this study, curves were identified and measured via centerline points placed digitally through the colonic lumen, and compared between supine and prone patient positioning.
Results
75 colonographies were examined. The mean age was 68 years and 37/75 were male. BMI data was available for 56 patients, with mean BMI 29.4 (SD 5.7). There were no significant differences in total mean degrees of curvature between supine and prone positions [75.3 (SD 13.5) vs. 77.3 (SD 15.3), p=0.07], nor a significantly higher total number of curves >100 degrees [4.0 (SD 2.0) vs. 4.5 (SD 2.3), p=0.14]. No significant correlation was seen between BMI and change in position (correlation factor 0.2, p=0.13).
Conclusions
No significant differences were found between the two positions during CT colonography. This certainly calls into question the strategy of starting in prone position, even in higher BMI patients. However, CT colonography doesn’t account for changes that can occur during colonoscopy, as the scope itself can dynamically affect angulations within the colon.
Funding Agencies
None
Collapse
Affiliation(s)
- P Tan
- University of Ottawa, Ottawa, ON, Canada
| | | | - K Barr
- Queen’s University, Kingston, ON, Canada
| | - H Anvari
- Queen’s University, Kingston, ON, Canada
| | - T Ungi
- Queen’s University, Kingston, ON, Canada
| | | | - C Scott
- Queen’s University, Kingston, ON, Canada
| | - R Bechara
- Queen’s University, Kingston, ON, Canada
| | - L Hookey
- Queen’s University, Kingston, ON, Canada
| |
Collapse
|
2
|
Tan P, Laframboise J, Scott C, Bechara R, Lasso A, Asselin M, Holden M, Ungi T, Fichtinger G, Hookey L. A222 QUANTITATIVE ASSESSMENT TO DETERMINE CHANGES IN COLONIC CURVATURE WITH SUPINE VERSUS PRONE PATIENT POSITION USING COMPUTED TOMOGRAPHY COLONOGRAPHY. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P Tan
- Queen’s University, Kingston, ON, Canada
| | | | - C Scott
- Queen’s University, Kingston, ON, Canada
| | - R Bechara
- Queen’s University, Kingston, ON, Canada
| | - A Lasso
- Queen’s University, Kingston, ON, Canada
| | - M Asselin
- Queen’s University, Kingston, ON, Canada
| | - M Holden
- Queen’s University, Kingston, ON, Canada
| | - T Ungi
- Queen’s University, Kingston, ON, Canada
| | | | - L Hookey
- Queen’s University, Kingston, ON, Canada
| |
Collapse
|
3
|
Laframboise J, Cafarelli E. Differential effects of voluntary and involuntary activation on contractile characteristics of two human muscles. J Appl Physiol (1985) 1994; 76:1400-2. [PMID: 8005889 DOI: 10.1152/jappl.1994.76.3.1400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
To compare the maximal rate of rise of torque (MRRT) of quadriceps femoris and adductor pollicis during voluntary and involuntary contractions, subjects performed voluntary isometric contractions as rapidly as possible over the full range of force-producing capacity. Involuntary contractions were evoked with single shocks and with trains of 10 pulses at 100 Hz at increasing voltages applied directly to the femoral and ulnar nerves. There were linear relationships between MRRT and absolute torque in both muscles during involuntary and voluntary contractions. At the same absolute torque, quadriceps femoris had a higher MRRT than adductor pollicis when both were voluntarily activated (P < 0.05). However, there was no difference in MRRT between these muscles during stimulated contractions. Compared with involuntary tetanic contractions, MRRT during voluntary contractions was the same in quadriceps femoris and was less in adductor pollicis (P < 0.05). These observations suggest that in activating some muscles, such as adductor pollicis, the central nervous system may adopt the strategy of a more gradual excitation to make the contractions more task appropriate.
Collapse
Affiliation(s)
- J Laframboise
- Department of Physical Education, Faculty of Pure and Applied Science, York University, Toronto, Ontario, Canada
| | | |
Collapse
|
4
|
Houde L, Dubois T, Lafontaine R, Laframboise J, Roussel D. [The team examination of learning disorders of school children]. Can Psychiatr Assoc J 1965; 10:359-371. [PMID: 5829416 DOI: 10.1177/070674376501000506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
This paper describes a method for the examination of learning disorders. The examination of a child and his parents is carried out simultaneously by a team including a social worker, a psychiatrist, a specialized educator in remedial teaching, a psychologist and a neurologist. Each specialist examines the child alone but observes the examinations by other team members through a one-way mirror. This procedure favours a more unified and refined comprehensive diagnosis while permitting the use of more specific examination techniques and tests whose limitations can be immediately compensated and complemented by the other team members. Each professional discipline develops means of elucidating more and more definite aspects of the studied learning disorders. Patients can thus obtain more complete services in a single visit to the hospital. In most cases, this examination is sufficient to permit immediate recommendations to the child and his parents for precise and practical therapeutic measures. Also extremely valuable is the enrichment each professional team member derives through observing the work of his co-workers. Repeated confrontation of working methods refines observation skills, widens scientific perspectives, increases mutual understanding and respect, and gives everyone a deeper knowledge of his own specialization.
Collapse
|