الفهرس 
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Abstract
Mechanical ventilation is a vital, life-saving therapy
for patients with dangerous illness and respiratory disorder.
Endotracheal tube suction is a procedure which aims to
maintain clear pathway by mechanically expelling
accumulated pulmonary excretions in patients with artificial
airways. This procedure is associated with consequences and
risks as haemorrhage, lesions of the tracheal mucosa,
infections, atelectasis, cardiovascular disorder, hypoxemia
and increase intracranial pressure. Its major aim is to
evacuate accumulated lung excretion in order to keep the air
pathways permeability; provide sufficient oxygenation; avoid
the risk of ventilator-associated pneumonia (VAP) and
prevent atelectasis and pulmonary consolidation. Performing
tracheal suction procedure is responsibility of the critical care
nurse and she should exert all of her effort to minimize any
complication that can arise from this procedure.
Aim of the study:
This study aimed to assess factors contributing to post
suction hypoxemia in critically ill patients.
Research question:
What are the factors contributing to post suction
hypoxemia in critically ill patients?
Research Design:
A descriptive exploratory design was utilized in this study.
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107
Research Setting:
This study was carried out in the Intensive Care Units
of Alexandria Main Abo Quir- Hospital.
Subjects:
A purposive sample of 66 patients of both genders was
involved in the study based on the power analysis (Epi-info
program) with the following information (population size =
88 over 4 months. Expected frequency = 50%, acceptable
error =5 % confidence coefficient = 95 %. Number of
subjects was estimated by the power analysis (Epi-info
program).
Convenient sample of all nurses working in intensive
care unit at Alexandria Abo Quir hospital.
Tools used to accomplish the aim of this study:
Two tools were used for data collection:
Tool (I): Patient related factors: which include 4 parts used
to assess patients’ related factors contributing to
post suction hypoxemia in critical ill patients.
Tool (2): Nurses related factors: which include 2 parts used
to assess nurses’ related factors contributing to post
suction hypoxemia in critical ill patients?
Results:
The results of the study showed that:
Regarding the demographic characteristics of the patients
under the study, the findings of this study revealed that
more than half of them were male.
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108
As regards marital status more than two third of them
were married, more than half of them had high education,
and more than three quarter of them were employed.
Concerning the studied patients` history the current study
showed that, more than half of them were smokers and
had hypertension.
Regarding the assessment data of the studied patients the
present study revealed that, regarding diagnosis less than
one fourth of them had DKA (Diabetic Ketoacidosis),
hemorrhagic stroke, CAPG (coronary artery bypass
graft), and RTA (route traffic accident) respectively.
Concerning the intubation data of the studied patients the
current study showed that, regarding the causes of
intubation more than half of them had DLC (disturbed
level of conscious).
Regarding the comparison between the mean scores of
the patients` physiological parameters before and after
suctioning procedure, the current study showed that there
were highly statistically significance differences between
mean scores of the patients` physiological parameters
before and after suctioning procedure in which p≤ 0.001
except for Hco3, there was insignificant difference before
and after suctioning procedure in which p> 0.05.
Concerning the demographic characteristics of the
studied nurses, the findings of this study revealed that
Summary
109
more than three quarters of them were in the age group of
18 ≥ 30 years old.
As regards the total level of nurses’ knowledge regarding
suctioning procedure, the current study showed that the
majority of the studied nurses had unsatisfactory level of
knowledge regarding suctioning procedure, while less
than one fourth of them had satisfactory level of
knowledge regarding suctioning procedure.
Concerning the total level of the nurses’ performance of
suctioning procedure, the present study illustrated that
only about half of the studied nurses had satisfactory
level of suctioning performance.
Concerning the relation between the total nurses’
knowledge and the total practice regarding suctioning
procedure, the present study revealed that there was a
statistically insignificance relation between nurses’ total
level of practice and total level of knowledge in which p>
0.05.
As regards the relation between the nurses’ demographic
characteristics and total nurses’ level of practice
regarding suctioning procedure, this study showed that
there were a statistically insignificance relation between
nurses’ demographic characteristics and total nurses’
level of practice regarding suctioning procedure in which
p> 0.05.
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110
As regards the relation between the nurses’ demographic
characteristics and the total nurses’ level of knowledge
regarding suctioning procedure, the present study
clarified that there were a highly statistically significance
relation between nurses’ age, qualification, and total
years of ICU experience and total nurses’ level of
knowledge regarding suctioning procedure in which p≤
0.001, while there was a statistically significance relation
between nurses’ total years of professional experience
and total nurses’ level of knowledge regarding suctioning
procedure in which p≤ 0.005