scholarly journals Toward Improved Communication in Laparoscopic Surgery: Accounting for Multiple Frames of Reference and Mental Rotations

2005 ◽  
Vol 49 (11) ◽  
pp. 999-1003 ◽  
Author(s):  
Cristina Rivera ◽  
Caroline G.L. Cao
Keyword(s):  
Laparoscopic Surgery ◽  
Collaborative Work ◽  
Frame Of Reference ◽  
Frames Of Reference ◽  
Mental Rotations ◽  
Multiple Frames ◽  
Vantage Points ◽  
The Right ◽  
Display Control ◽  
Common Frame Of Reference

This work is an examination of barriers to communication between the attending and assisting surgeons during laparoscopic surgery, where the same image of the surgical site is viewed from different vantage points with respect to the patient. Part of the problem lies with the multiple frames of reference each surgeon holds, and the mental rotations each must perform to construct a common frame of reference for communication and collaborative work. An experiment was conducted to demonstrate the effects of display-control incongruency on the performance of an aiming task in a simulated laparoscopic environment. Aiming performance was best when the camera was oriented at 0° perspective and worsened as the angle of deviation from 0° increased. Performance was affected to a greater degree by viewing perspectives from the left of the subject than viewing perspectives from the right. Results also suggest that when surgeons are facing each other, as is the case in many laparoscopic surgeries, one surgeon's performance will be worse than the other's. The mismatched display-control perspectives are compounded by ambiguous spatial references in verbal communication. From these findings, a case can be made for the importance of vocabulary that forces a common frame of reference during laparoscopic surgery.

Relationship between Frames of Reference and Mirror-Image Reversals

Perception ◽  
10.1068/p5529 ◽  
2007 ◽  
Vol 36 (7) ◽  
pp. 1049-1056 ◽  
Author(s):  
Hirokazu Yoshimura ◽  
Tatsuo Tabata
Keyword(s):  
Mirror Image ◽  
Frame Of Reference ◽  
The Other ◽  
Frames Of Reference ◽  
Physical Aspect ◽  
Other Hand ◽  
Extended Problem ◽  
Left Right Asymmetry ◽  
Common Frame Of Reference ◽  
Intrinsic Frame

The mirror puzzle related to the perception of mirror images as left–right reversed can be more fully understood by considering an extended problem that includes also the perception of mirror images that are not left–right reversed. The purpose of the present study is to clarify the physical aspect of this extended problem logically and parsimoniously. Separate use of the intrinsic frame of reference that belongs to the object and one that belongs to its mirror image always leads to the perception of left–right reversal when the object has left–right asymmetry; on the other hand, the perception of left–right nonreversal is always due to the application of a common frame of reference to the object and its mirror image.

After dispossession: An urban rights praxis of remaining in Vancouver’s Downtown Eastside

2019 ◽  
Vol 38 (2) ◽  
pp. 229-247
Author(s):  
Jeffrey R Masuda ◽  
Aaron Franks ◽  
Audrey Kobayashi ◽  
Trevor Wideman
Keyword(s):  
Second World War ◽  
Frame Of Reference ◽  
World War ◽  
Downtown Eastside ◽  
Political Struggles ◽  
The Right ◽  
Second World ◽  
Common Frame Of Reference

Drawing from a multi-year research presence in Vancouver, Canada’s Downtown Eastside, we generate insights into the praxis of the historically dispossessed within contemporary processes of subaltern urbanisms. Interviews with past and present Downtown Eastside residents reveal parallel narratives of dispossession and remaining between Japanese Canadians who were expelled during the Second World War and communities in the present-day neighborhood. A common frame of reference, a form of dispossessive collectivism, takes shape in a tenuous Right to Remain premised on material, cultural, existential, and political struggles that have inflected life in the Downtown Eastside for over a century of colonial urbanization. The Right to Remain can provide a situated and integrative vocabulary for consolidating grassroots praxis across diverse social groupings and settings to address urban spatial claims (symbolically and materially) and to confront forces of gentrification driving dispossession processes in Vancouver and beyond.

Frames of Reference for Self-Evaluation of Ability in Mathematics

2004 ◽  
Vol 94 (2) ◽  
pp. 619-632 ◽  
Author(s):  
Sidsel Skaalvik ◽  
Einar M. Skaalvik
Keyword(s):  
Adult Students ◽  
Self Efficacy ◽  
Reference Model ◽  
Frame Of Reference ◽  
Self Concept ◽  
Frames Of Reference ◽  
Self Evaluation ◽  
Mathematics Ability ◽  
External Frame ◽  
Multiple Frames

Measures of eight frame-specific self-evaluations of ability in mathematics were used to predict general mathematics self-concept and self-efficacy. Participants were 900 Norwegian students in Grade 6 ( n = 277), Grade 9 ( n = 236), Grade 11 ( n = 263), and adult students attending senior high school ( n = 124). Four items measured frame-specific self-evaluation of achievement based on external frames of reference whereas four items measured frame-specific self-evaluation based on internal frames of reference. Regression analyses were used to test relations between the frame-specific self-evaluations and general mathematics self-concept and self-efficacy. The analyses indicated that self-evaluation based on comparison with other students in class (an external frame of reference) and on comparison of mathematics achievement with achievement in other school subjects (an internal frame of reference) were robust predictors of both mathematics self-concept and self-efficacy. The analyses also indicated that students are using multiple frames of reference when evaluating their mathematics ability. Implications of the result for the internal-external frame of reference model are discussed.

Omental Infarction: A Case Treated with Laparoscopic Surgery

2019 ◽  
pp. 1-3
Author(s):  
Bertrand Ng ◽  
Arafat Yasser
Keyword(s):  
Diabetes Mellitus ◽  
Laparoscopic Surgery ◽  
Hospital Stay ◽  
Acute Cholecystitis ◽  
Inflammatory Markers ◽  
Acute Onset ◽  
Laparoscopy Surgery ◽  
History Of ◽  
Background History ◽  
The Right

Omental infarct is a rare cause of an acute abdomen that arises from an interruption of blood supply to the omentum. Here, we present a case of omental infarct in a 67-year-old gentleman with background history of diabetes mellitus who present unusually with a severe acute onset right hypochondrium pain. Examination revealed that he was tender to touch at the right and was having localized guarding. His inflammatory markers were normal. He was successfully treated with laparoscopy surgery and he was subsequently discharged the following day. Omental infarct cases with right hypochondrium pain can sometimes mimicked acute cholecystitis and management includes laparoscopic surgery which can hasten symptoms resolution and reduces hospital stay, however recommendation for surgery has to be balanced with anesthetics risk and complication of the surgery itself.

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