Patient positioning for spinal anesthesia : construction and validation of a fl ipchart

DOI: http://dx.doi.org/10.1590/19820194201800005 Universidade Federal do Ceará, Fortaleza, CE, Brazil. Hospital and Maternity Hospital São Lucas, Juazeiro do Norte, CE, Brazil. Universidade Federal do Cariri, Juazeiro do Norte, CE, Brazil. Confl icts of interest: the article presents partial results of the ongoing Doctoral dissertation “Educative technology for correct positioning in spinal anesthesia: randomized and controlled clinical trial”, in the Graduate Nursing Program at Universidade Federal do Ceará, Fortaleza, CE, Brazil. Abstract Objective: Construct and validate an educational fl ipchart for pregnant women who are to be submitted to a cesarean section on positioning during spinal anesthesia. Methods: Methodological study involving the elaboration of the fl ipchart, validation with 22 surgical center nurses, 22 anesthetists and three judges with expertise in communication, followed by the pregnant women’s evaluation of the material. The Level Content Validity Index superior to 0.8 was used for the content validation and the binomial test to verify the level of agreement. Results: The fl ipchart consists of 15 pages, with orientations about advantages, disadvantages and positions for the spinal anesthesia. The mean Level Content Validity Index was 0.94 for the nurses, 0.93 for the anesthetists and 0.97 for the judges with expertise in communication. The pregnant women unanimously approved the material. Conclusion: The fl ipchart was constructed and validated and nursing can use it with pregnant women who are to be submitted to cesarean section under spinal anesthesia.


Introduction
Spinal anesthesia is an anesthetic technique widely used in cesarean sections.Compared to general anesthesia, it causes less neonatal exposure to depressant substances, maintains maternal consciousness, causes less perioperative bleeding and improves the quality of postoperative analgesia. (1)espite the high level of success, complications such as hypotension, postural puncture headache and nerve damage can occur.This may be associated, among other factors, with the inability to properly flex the spine. (1,2)he difficulty to maintain appropriate positioning may occur out of fear of anesthesia, common among people undergoing anesthetic-surgical procedures.In pregnant women, obtaining a proper position may be difficult due to the impaired identification of anatomical references and impaired flexing of the spine due to the increased abdominal volume. (3)uidelines on the procedure can help reduce fear and anxiety, and encourage patient collaboration with the positioning for anesthesia.The guidance and assistance for the correct positioning of the patient in the pre-anesthetic phase are nursing care and can take place through the use of educational technologies that facilitate the communication process. (4)he relevance of this subject was perceived during the authors' care routine, motivated by the question of what scientific evidence has been published about the position of the pregnant woman during spinal anesthesia.Therefore, an integrative review was performed which, despite the small number of articles published on the subject, showed that the positioning influences the effect, empowerment and time of onset, besides the pregnant woman's comfort and hemodynamic parameters, revealing its importance for the perioperative period and obstetric practice. (5)hese findings reinforced the need to construct educational technology on the subject, whose elaboration should be evidence-based, so that it has valid and understandable content for the target audience and contributes effectively to obstetric clinical practice.
In view of the above, the objective of this study was to construct and validate an educational flipchart for pregnant women who are to be submitted to cesarean section about the positioning during spinal anesthesia.

Methods
Methodological study developed between January and July 2017, in four phases: bibliographic survey; elaboration of flipchart; content and face validation by experts; assessment by target audience.

Bibliographic survey and construction of flipchart
The bibliographic survey considered the literature on the subject, in addition to the findings from the integrative review mentioned earlier. (5)Based on the scientific evidence identified, the authors constructed the flipchart.The recommendations were followed for the writing and layout of text for educational technologies for people with low education levels. (6)A designer was hired to design the characters and layout of the album using Adobe Illustrator CS3 and Adobe InDesign CS6.

Expert validation
Three expert groups, of nurses, anesthetists and education professionals, respectively, validated the flipchart, considering the appearance of the images, clarity, importance, practical applicability and relevance of the content.
The following were considered as inclusion criteria for group 1: to have teaching or care experience in a surgical center, where care is taken to assist the patient during spinal anesthesia; for group 2: to have teaching or care experience in anesthesiology, with emphasis on spinal anesthesia for cesarean section.
As it is educational material, three professionals from the education area composed expert group 3, called technicians, included based on their experience in the construction or analysis of educational materials.As an exclusion criterion for the three groups, less than two years of experience in question was considered.
The number of judges in groups 1 and 2 were calculated by the formula: n = Za2xP (-1-P) / e2.The coefficient of Za (confidence level) was set at 95%, P (interrater agreement ratio) 85%, and (accepted difference from expected level) equal to 15%.
The snowball technique was applied to select the judges, which consists of using reference chains to recruit the participants. (7)Thus, we sought indications of teachers at universities in the areas of nursing, medicine and pedagogy, in the regions of Cariri and Fortaleza, Ceará, Brazil.The judges were asked to appoint other professionals.This invitation was forwarded via e-mail.Emails were sent to twenty-four nurses, with two refusals, justified by lack of time to participate.Thirty invitations were forwarded to anesthesiologists with eight absences.The judges from the area of education who were invited agreed to participate in the research.After the experts had confirmed their participation, the material and evaluation instruments were sent by e-mail.The evaluation forms were returned within the required ten-day deadline.
The data collection instrument was submitted to a pilot test, without modifications.This instrument contained the following aspects: clarity, practical relevance and theoretical relevance.For each item, the options to be indicated corresponded to the level of agreement (low, medium, high and very high).There was also room to register suggestions on the educational material.The suggested changes were made and, after a new analysis by the experts, the items were considered valid.

Evaluation by the target audience
After the expert validation, ten pregnant women in the third trimester of pregnancy evaluated the flipchart, selected by convenience while awaiting care at a primary health care unit of the Family Health Strategy located in Cariri, a metropolitan region in the South of the State of Ceará, Brazil.Low-risk prenatal care is offered in primary health care.
The pregnant women had access to the printed flipchart and completed an instrument to evaluate the material.For each page of the flipchart, they indicated their level of agreement (little, medium, very and very much) regarding the clarity and comprehension of the images and the text.

Analysis of results
The data was organized in Microsoft Excel 2016 through double data entry, aiming to guarantee the reliability of the inserted data.The Content Validity Index was calculated as follows: I-CVI (Item-level Content Validity Index), interrater agreement level for each item evaluated; S-CVI / AVE (Scale-level Content Validity Index, Averange Calculation Method), proportion of items each expert agreed with; and S-CVI (Scale-level Content Validity Index), mean S-CVI / AVE.The binomial test was used to verify if the agreement ratio was statistically equal to or greater than the previously defined value to consider the item valid, of 0.80, with a significance level of 5%.

Ethical aspects
This study received approval from the Research Ethics Committee of the Regional University of Cariri -URCA, under number 1.837.179.

Results
In table 1, the three expert groups' sociodemographic characteristics are presented.
Regarding the validation process, for 14 of the 22 nurse experts, the S-CVI / AVE was 1, representing their agreement with all items evaluated.In this group, for one expert, the S-CVI / AVE was 0.97; for two it was 0.94; for one, 0.88; for two 0.80, and for two it was 0.75.Also, for 14 anesthesia experts, the S-CVI / AVE was 1.For two, 0.94; for two, 0.91; for two, 0.83; for one, 0.69 and for one, 0.58.The S-CVI of the mean S-CVI / AVE of the anesthesiology experts was 0.93 while, in the group of nurse experts, it was 0.94.
Table 2 presents consolidated data for the groups of anesthesiology and nurse experts, regarding the agreement frequencies and content validity indices per item.
All communication experts agreed on the 33 items, except one who disagreed on two items in fig-ure 5, which was modified.The three communication experts unanimously agreed on the other items.The S-CVI / AVE of two judges was 1, and of one judge 0.93.The S-CVI of this group was 0.97, without any suggestion to change any of the other items.
The nurse and anesthesiology experts suggested 19 adjustments that were made, such as monitoring the pregnant woman, wearing a cap, positioning of the patient's hands on her legs during anesthesia, standardization of terms, less emphasis on complications, among others.After the changes, the flipchart consisted of 15 pages: cover, back cover, presentation, five pages containing the figures and five pages with their respective script forms, references and the final page with the technical file.The items submitted to expert evaluation were the cover, the figures and their respective script forms, which displayed the guidelines the nurse is to provide during the educational activity.In figure 1, some of the main images of the flipchart are shown.
Image 1 of the flipchart displays a pregnant woman and an anesthetist, highlighting the needle and the place where it is inserted, evidencing the intervertebral spaces and the spinal cord, as well as the area related to the body area the anesthetic action covers.In script form 1, it is described how the nurse should guide pregnant women about the definition of spinal anesthesia.
Image 2 represents the pregnant woman and the anesthetist advising on the advantages and disadvantages of spinal anesthesia; this content is described in script form 2. Image 3 shows the pregnant woman with the column bent; script form 3 emphasizes the essential characteristics for appropriate positioning during spinal anesthesia.
In image 4, three main varieties of position the pregnant woman can take are shown.Script form 4 deals with the anesthetist's choice, together with the pregnant woman, of one of these positions.Image 5 presents the image of the woman with the baby on her lap and the contents of script form 5 reinforce the benefi ts of proper positioning during spinal anesthesia.Th e pregnant women who evaluated the fl ipchart were between 19 and 38 years of age, with a mean age of 28.3 years.All were literate, the majority having completed high school (40%) or taking higher education (20%).Th e women were unanimous on the clarity and relevance of the items in the fl ipchart.Th ey also unanimously considered all the information important and that the images in the fl ipchart help to improve the understanding about the subject.

Discussion
Th e lack of studies on the construction and validation of educational technologies to guide pregnant women or other populations about the positioning for spinal anesthesia was a limitation of this study, making it diffi cult to compare and discuss the results.In addition, the pregnant women who evaluated the material came from a specifi c region and were users of the Unifi ed Health System, so that the opinions obtained may not represent the reality of pregnant women from other regions or who are users of private health services.
Th e construction and validation of the fl ipchart discussed here converges with the program Safe Surgeries Save Lives, established by the World Health Organization (WHO), which proposes that the team uses known methods to prevent damage in the administration of anesthetics, while protecting the patient from pain. (8)It is also in accordance with the guidelines of the Stork Network, established by the Brazilian Unifi ed Health System (SUS), which proposes guaranteeing safety in childbirth and birth care. (9)h e three expert groups almost unanimously accepted the evaluation of the fl ipchart's applicability to the perioperative nursing context.Th is outcome is considered relevant, as educational technology needs to be feasible, in addition to being comprehensible.Corroborating this result, the specialists in the validation study of the educational leafl et on HIV / AIDS judged this material as an excellent complement to the health professionals' guidance activities on the subject. (10)Th e result is similar to the validation of the educational leafl et on dietary guidelines to improve the quality of life of adults in Malaysia with I-CVI 0.95. (11)h e perioperative nursing routine includes guidelines for patients, such as those on positioning during anesthesia.In this sense, according to the ex- The language of the flipchart was considered clear, comprehensible and appropriate.This data is in accordance with a study about the validation of an educational booklet for teachers about first aid at school, which obtained a satisfactory evaluation of the clarity, objectivity and attractiveness of the language. (12)The same result was obtained in the aforementioned study on dietary practices, whose language was judged clear and comprehensible, presenting I-CVI 1. (11) It is important to emphasize the importance of the language used in educational materials, so that they are clear and understandable to the target audience, and can present practical relevance.Considering that the users of the flipchart are health professionals, the texts of the script forms target these professionals.Thus, even if there is technical language, professionals should explain the content at the level of the target audience's understanding.
A study conducted in Swedish hospitals to characterize educational materials provided to surgical patients with colorectal cancer identified that 29% of the materials contained difficult language for the target audience. (13)In this sense, it is essential for the target audience to evaluate the educational technologies.An evaluation by expert judges is also fundamental to permit the identification of possible aspects that are incomprehensible.
In this study, the pregnant women evaluated that the flipchart was satisfactory, in line with other studies involving the target audiences, such as the study to validate an educational technology on venous ulcer care, whose participants considered that the material was appropriate. (14)In the validation of an educational leaflet on vertical HIV transmission, the evaluation by the target audience also reached a satisfactory level of agreement. (15)he pregnant women's evaluation of images from the flipchart showed unanimity about helping to understand the subject.Other studies have revealed similar results, like in the case of the validation of a flipchart on breastfeeding by postpartum women, who evaluated that the images were clear, comprehensible and relevant. (16) educational practice, the use of figures is quite pertinent, as it contributes to the target audience's understanding regardless of their education level schooling, in addition to making the educational material more attractive.
The evaluation of educational technologies by professionals with experience in evaluating educational materials is important because they have a sharper look on aspects that can influence the learning process.In this sense, the result of this study obtained a satisfactory evaluation, as only one judge disagreed on only one item, not interfering in the general evaluation of the material, with S-CVI 0.97.This data corroborates the study that validated an educational technology for teaching about sexually transmitted diseases, with all items presenting I-CVI 1 in the group of technical experts. (17)onsidering the three groups of expert judges on all items, the flipchart obtained an S-CVI of 0.94 and was considered validated in the content and face validation.

Conclusion
The flipchart "Correct positioning of pregnant women for spinal anesthesia" was constructed and submitted to content and face validation by experts and by the target audience.Nurses working at maternity hospitals and obstetric surgical centers can use it as a tool to contribute to the adoption of appropriate and safe positioning during spinal anesthesia for cesarean section.Although the content and face validation of the flipchart indicate the feasibility of its use in nursing practice, its effectiveness needs further investigation by analyzing the pregnant women's understanding of the knowledge and their respective adoption of an appropriate position during the spinal anesthesia.

Collaborations
Pinto SL, Galindo Neto NM, Sampaio LA, Oliveira MF and Caetano JA participated in the conception of the Project, analysis and interpretation of the data, writing of the article and critical review of the intellectual content, approving its final version.

Figure 1 .
Figure 1.Some pages of the fi nal version of the fl ipchart on the positioning of pregnant women for spinal anesthesia

Table 1 .
Sociodemographic characteristics of three expert groups

Table 2 .
Agreement between nurses and anesthetists regarding the items of the flipchart *Item-Level Content Validity Index; ** Agreement percentage; *** Binomial test