The Effect of Hydration and Caffeine on Post-Spinal Anesthesia Headache: A Randomized Controlled Study
Objective: Evaluate the effects of hydration and caffeine, administered of patients who received spinal anesthesia, on postspinal headache. Methods: Randomized controlled experimental study. The study was carried out in the post-anesthesia care unit and surgery clinics of a City Hospital between November and December 2014. The sample composed of 90 patients who received spinal anesthesia. The patients were assigned into 3 groups based on the order of leaving the operating room by using a randomization check list. Percentage and chi-square test were used to assess the data. Results: It was found that 23.3% of the patients in the first group (receiving 3000 cc intravenous fluid), 20.0% of the patients in the second group (Intravenous 3000 ml fluid + 75 mg (4 cups) oral caffeine), and 13.3% of the patients in the third group (Intravenous 4000 ml fluid) had headaches. Post-Spinal Anesthesia Headache was similar between the groups. But, it was determined that number of the patients with headache in third group was lower. Most of the patients in all three groups specified that their headaches reduced by resting, increased by standing up, did not cover their nucha and shoulder, and increased by movement. Conclusion: It is concluded that although there was no statistical significance, rate of headache in the hydration group (Third group) was lower than the other groups. Also it was determined that administration of excess fluid after spinal anesthesia reduced the level of post-spinal headache but it could not prevent its development.
Introduction
Spinal anesthesia is an anesthesia method in which local anesthetics are injected in subarachnoid space and all the senses in the lower part of the body are blocked by administering small volume of local anesthetics [1]. This method has superiorities in many operation and patient groups compared to general anesthesia. It has numerous advantages such as continuation of the spontaneous ventilation, awaking of patient and maintenance of protective reflexes such as swallowing and coughing during operation, as well as early mobilization, minimal pulmonary complications, continuation of analgesia and shortened length of hospital stay [2, 3].
Spinal anesthesia has a rapid effect and is easy to apply, which makes spinal anesthesia a preferable method [4, 5, 6]. Nowadays, this technique is commonly used for thoracic surgeries (T4) in general operations, gynecology, orthopedics and urology [7, 8, 9]. Despite various merits, spinal anesthesia has some complications such as nausea, vomiting, neck stiffness, double vision, tinnitus, photophobia, hearing loss, neck pain, and headache [10, 11, 12, 13]. A previous study Bedirli N, et al. reported that the prevalence of post-spinal anesthesia headache was 25%. On the other hand, in the study of Zeger, et al. (2012), they found that the prevalence of postoperative headaches was about 30% [14].
After dura puncture made due to any injury in dura, headache may develop. Dural tear may result in potentially high quantity of CSF (Cerebrospinal fluid) leak. After a dural tear, the decrease in the CSF pressure due to CSF leaking associated with the dural defect and subsequent cerebral venous dilatation leads to PSHA (post spinal headache) [1, 15, 16]. PSHA worsens within 15 minutes after sitting down and standing up following any lumbar puncture and relieves within 15 minutes after lying positioning. 90% of PSHA may develop three days after the procedure and 66% may develop during the first 48 hours [13]. Headache is typically bilateral frontal or retro orbital, occipital and progress to nucha. Unless some cases receive treatment for headache, the surgical repair may be required [16]. PSHA likely leads to significant morbidity and is a complication that requires a serious treatment. PSHA is usually a self-limiting process [17]. PSHA may cause other problems in addition to the symptoms of headache. Treatment of PSHA may bring along delayed hospital discharges and hospital readmissions and this increases health expenses [18]. Symptoms of the condition can be self-limiting but in untreated or undiagnosed cases, PSHA can result in significant associated comorbidity, including death [19]. Therefore, it is important to take measures against the complications that may develop after spinal anesthesia, and minimize or early notice the potential complications [20].
Patients with PSHA should not suffer needlessly. There are numerous conservative treatment options for PSHA such as hydration, caffeine, and analgesics or 4 other pharmacologic approaches, each of which has varying degrees of efficacy [19]. In the literature; lying position, oral or intravenous fluid administration, analgesics and caffeine are stated as the conservative treatment to prevent post- spinal headache. It is reported that hydration and caffeine affect prevention and reduction of PSHA by increasing the CSF production [21, 22]. Caffeine is a central nervous system stimulant that produces cerebral vasoconstriction among other properties and causes a transient reduction in cerebral blood flow. Yet in the study conducted by Camann, et al. [23] in Boston, they determined that application of oral caffeine decreased level of PSHA in patients undergoing surgeries under spinal anesthesia. However, although many methods are suggested for prevention of PSHA, which method is more efficient today is still controversial matter and therefore it is required to conduct further randomized controlled trials on this subject [1]. In the light of this information; in this study it is aimed to compare the effect of fluid and caffeine administrations on PSHA in the patients.
The hypotheses of the study H1= Hydration and Caffeine administration has no effect in preventing headache in patients under spinal anesthesia. H2=Caffeine administration has an effect in preventing headache in patients under spinal anesthesia. H3= Hydration has an effect in preventing headache in patients under spinal anesthesia.
Method
The study was carried out in the post-anesthesia care unit and surgery clinics of a City Hospital between November and December 2014.
The population of the study consisted of patients who received spinal anesthesia at Hospital. The sample of the study consisted of a total of ninety patients (30 patients in 3000 cc hydration group, 30 patients in 3000 cc hydration+ caffeine group, and 30 patients in 4000 cc hydration group) who required urology or general surgery, received spinal anesthesia at Hospital between November and December 2014, and agreed to participate in the study. The patients who received spinal anesthesia were assigned into three groups in a randomized and controlled manner based on order of leaving the operating room in the early postoperative period. This procedure was continued until the targeted number was reached. The patients who agreed the spinal anesthesia, and did not have any contraindication for spinal anesthesia, hemorrhage and coagulopathy, cardiovascular diseases, neurological deficits, chronic headache (like migraine), congestive heart failure or chronic renal failure were included in the study. 4 patients who developed tachyarrhythmia during the study were excluded from the study.
A patient information form was used to gather the data of the study.
Patient Information Form
Developed by the researchers upon related literature review, the questionnaire had 21 questions related to the patients’ descriptive characteristics [24, 25]. This form was filled by the researcher conducting a face-to-face interview with the patients. The questions on age, gender, educational status, height, weight, BMI, previous surgeries, number of interventions for spinal anesthesia, previous spinal anesthesia administration, educational period of the person applying spinal anesthesia, interval of spinal anesthesia, state of moving the back during spinal anesthesia, presence of headache, onset time of headache, reduction in headache by resting, diagnosis of headache, pain relieving method, factors increasing headache, status of the pain to cover nucha and shoulder, and increasing of headache by movement were asked to the patients.
Verbal Category Scale (VCS)
This scale, also called as Simple Descriptive Scale, aims to assess the pain level and is based on selection of the most appropriate term defining the pain status by the patient. The pain level ranges from mild to unbearable level. The patient/person is asked to select the option appropriate for the condition. Melzack and Torgerson used “mild”, “discomforting”, “distressing”, “horrible”, “excruciating” words to define the pain level. The scale was used due to its advantages such as being easily applicable and having a simple classification [26].
In the study, in addition to the verbal pain scale, a questionnaire prepared according to the Post-Spinal Headache classification of “International Headache Society” was also administered to identify whether the headaches of the patients were post spinal headaches or not [27, 28].
The subarachnoid space was inserted at L3-L4, L4- L5 space by using a 27 quincke needle after skin of the participant was cleaned in the sitting position in accordance with the rules of antisepsis and covered. 3 ml (15 mg) of 0.5% hyperbaric bupivacaine was injected to the intrathecal space. Since most of the patients were older than 34 years in the study, this needle type was used. Intravenous vascular access was established to the patients before administering premedication. 0.9% NaCl solution was given to all the patients including the control group: It was started to be administered in the intraoperative period just before spinal anesthesia. After the patients were taken to the operating room, it was noticed to administer the fluids in the same amount to the patients. 0.9% NaCl isotonic fluid was given to all of the patients in group 3. Routinely, fluid of 3000 ml is administered to the patients. Since in the literature it is stated that intravenous fluids are administered as 6ml/ kg/h at medium-sized surgeries, such administration was implemented to the patients [29]. According to randomization chart, 500 ml of 0.9% NaCl (its rate suitable for the patients by considering their hemodynamic parameters) was administered to the patients in Group 1 30 minutes before spinal anesthesia. Afterwards, standard monitorization was performed in all of the patients in both groups taken into the operating room and infusion of 0.9% NaCl was started. After they came to the clinic, infusion of 0.9% NaCl was continued. Totally 3000 ml of 0.9% NaCl was administered. Additionally the patients in second group drank 4 cups of Instant Coffee, each of which contained 75 mg of caffeine, in the clinic 8 hours after the surgery (75*4=300 mg). In the literature, it is suggested to administer 300 mg of caffeine daily in order for caffeine to be effective in headache [17]. 500 ml of 0.9% NaCl (its rate suitable for the patients by considering their hemodynamic parameters) was intravenously administered to the patients in Group 3 just before spinal anesthesia. Then, standard monitorization was performed in all of the patients in both groups taken into the operating room and infusion of 0.9% NaCl was started. After they came to the clinic, infusion of 0.9% NaCl was continued. Totally 4000 ml of 0.9% NaCl was administered. All of the patients in three groups were informed not to drink other fluids containing caffeine such as tea and coke in particular.
The patients were informed about the procedure; the patients gave their verbal consent before the participation. Firstly, the patients were verbally asked whether they would participate in the study or not. Written consents of those who verbally agreed to participate in the study were also obtained. The patients included in the study were divided into three groups as randomized controlled based on order of leaving the operating room and specified amounts of fluid and caffeine were administered to the groups.
The study was submitted to the an university, Faculty of Health Sciences Ethics Committee. Approval of Ethics Committee was obtained for the study. Questionnaire-related permission was received from the an University, Faculty of Health Sciences. Questionnaire Committee assessed the relevance of questions in the patient information form. Written official permissions were received from Hospital, where the study was conducted. Written consents of the patients who verbally agreed to participate in the study were also obtained. Necessary explanations about the aim of the study, administration method and results planned to be obtained were made to the patients included in the study and their verbal consent was taken. Written consents of the patients whose verbal consent was received were also obtained. The ethical principle of “Informed Consent” was realized by explaining the aim of the study to the patients before data collection in order to protect rights of the patients included in the study; the ethical principle of ”Protection of Confidentiality and Privacy” by stating that the acquired data would be kept confidential; and the ethical principle of “Respect for Autonomy” by including volunteer patients in the study. In the study, the ethical principle of “Respect for Human Dignity” was taken into consideration. Those who wanted to participate in the study were included in the study. The Declaration of Helsinki regarding human rights was obeyed during the study due to necessity of protection of individual rights. Non-disclosure of identity information of the patients was ethically taken into consideration. The patients were informed about the risk and benefits of the study through consent form.
Dependent Variables
Post Spinal Headache.
Independent Variables
Hydration and caffeine, practitioner anesthetist, number of spinal anesthesia-related interventions.
Statistical Analysis
Statistical Package for the Social Science (SPSS Inc, Chicago, Illinois, USA) version 16.0 was used for the analysis. The difference between the mean scores in terms of age, height, weight, and BMI was evaluated by using two independent samples t tests. Chi square test was used to compare the characteristics between the groups.
This study was a randomized controlled study. The patients who received spinal anesthesia were given number based on order of leaving the operating room. The research and patients were not blinded. Since it is impossible to determine list of the patients, a randomization list prepared by a computer program was used in order to avoid bias while assigning the patients into the groups. Since there was no participant list, the letters “A”,”B”, and “C” written by the computer program against numbers were matched with the groups. In the list, the letter “A” represented the patients to be included in the control group, the letter “B” represented the patients to be included in the caffeine group and the letter “C” represented the patients to be included in the hydration group. The patients undergoing surgeries under spinal anesthesia were assigned into the groups based on their order in the randomization list. For example, the first operated participant was represented with the letter “A” and included in the control group. The second operated participant was included in the group B; whereas, the third operated participant was included in the group C. The patients were assigned into 3 groups based on the order of leaving the operating room by using a randomization check list [30, 31]. The fact that 16.7% of the sample were female is one of limitations of the study.
Results
When the descriptive characteristics of the groups were compared (Table 1), it was determined that majority of the patients were in age group of 34 years and over, male and primary school graduates in all three groups and there was no statistically significant difference between the groups in terms of age, height, weight, and mean BMI. They were similar in terms of their descriptive characteristics (p>0.05).
| Characteristics | Group I | Group II | Group III | Test and p value | |||
|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | ||
| Age | |||||||
| 18-25 years | 7 | 23.3 | 8 | 26.7 | 9 | 30 | X2=3.31 p>0.05 |
| 26-33 years | 4 | 13.3 | 4 | 13.3 | 8 | 20 | |
| 34 years and ↑ | 19 | 63.4 | 18 | 60 | 15 | 50 | |
| Gender | |||||||
| Female | 5 | 16.7 | 8 | 26.7 | 4 | 13.3 | X2=1.88 p>0.05 |
| Male | 25 | 83.3 | 22 | 73.3 | 26 | 86.7 | |
| Education | |||||||
| Primary education | 15 | 50 | 11 | 36.7 | 15 | 50 | X2=3.31 p>0.05 |
| Secondary education | 8 | 26.7 | 6 | 20 | 5 | 16.7 | |
| High school and ↑ | 7 | 23.3 | 13 | 43.3 | 10 | 33.3 | |
| Age [Mean (SD)] | 40.40±16.34 | 40.66±17.35 | 38.60±18.47 | F=0.12 p>0.05 | |||
| Height [Mean (SD)] | 1.70±0.06 | 1.71±0.07 | 1.72±0.06 | F=0.55 p>0.05 | |||
| Weight [Mean (SD)] | 75.70±8.35 | 75.30±11.44 | 74.80±12.41 | F=0.05 p>0.05 | |||
| BMI | 25.96±2.86 | 25.68±3.15 | 25.10±3.94 | F=0.53 p>0.05 |
Table 1: Comparison of characteristics of the groups regarding spinal anesthesia.
Table 2 shows comparison of the spinal anesthesia- related characteristics of the groups. In all three groups, it was determined that most of the patients were administered with this intervention once, anesthesia was administered from L4- L5 space. When the spinal anesthesia-related characteristics of the groups were compared, it was determined that there was no statistically significant difference was present between 3 groups were homogeneous (p>0.05).
| Characteristics | Group I | Group II | Group III | Test and p value | |||
|---|---|---|---|---|---|---|---|
| n | % | N | % | n | % | ||
| Surgery | |||||||
| General Surgery | 25 | 83.3 | 24 | 80 | 26 | 86.7 | X2=0.48 p>0.05 |
| Urology | 5 | 16.7 | 6 | 20 | 4 | 13.3 | |
| Spinal anesthesia interval | |||||||
| L3-4 | 2 | 6.7 | - | - | 2 | 6.7 | X2=2.09 p>0.05 |
| L4-5 | 28 | 93.3 | 30 | 100 | 28 | 93.3 |
Table 2: Comparison of characteristics of the groups regarding spinal anesthesia.
Table 3 shows comparison of the headache-related characteristics of the groups. It was determined that headache was present in 23.3% of the patients in first group (receiving 3000 cc fluid), 20.0% of the patients in second group (receiving 3000 cc fluid and caffeine), and 13.3% of the patients in third group (4000 cc fluid). Additionally, it was found that headache developed after 12.01-18.00 hours in 71.4% of the patients in first group and after 18.01 and ↑ in 50.0% of the patients in second and third groups. Headache of 14.3% of the patients in first group was mild and headache of 28.6% was excruciating; headache of 33.3% of the patients in second group was mild and headache of 16.7% was excruciating and headache of 75.0% of the patients in third group was mild and all the patients did not have an excruciating pain. It was observed that headache of 57.1% of the patients in first group was permanent; headache of 50.0% of the patients in second group was intermittent, and headache of 75.0% of the patients in third group was temporary. Most of the patients in all three groups specified that their headaches reduced by resting, increased by standing up, did not cover their nucha and shoulder, and increased by movement. When the headache- related characteristics of the groups were compared, it was determined that there was no statistically significant difference between the groups (p>0.05).
| Characteristics | Group I | Group II | Group III | Test and p value | |||
|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | ||
| Presence of Headache | |||||||
| Yes | 7 | 23.3 | 6 | 20 | 4 | 13.3 | X2=1.01 p>0.05 |
| No | 23 | 76.7 | 24 | 80 | 26 | 86.7 | |
| Onset time of headache | |||||||
| After 8-12 hours | 1 | 14.3 | 2 | 33.3 | 1 | 25 | X2=2.37 p>0.05 |
| After 12:01-18 hours | 5 | 71.4 | 1 | 16.7 | 1 | 25 | |
| After 18:01 hours and ↑ | 1 | 14.3 | 3 | 50 | 2 | 50 | |
| Reduction in headache through resting | |||||||
| Reducing | 5 | 71.4 | 4 | 66.7 | 3 | 75 | X2=1.27 p>0.05 |
| Not reducing | 2 | 28.6 | 2 | 33.3 | 1 | 25 | |
| Level of headache | |||||||
| Mild | 1 | 14.3 | 2 | 33.3 | 3 | 75 | X2=5.31 p>0.05 |
| Disturbing | 2 | 28.6 | 1 | 16.7 | 1 | 25 | |
| Severe | 1 | 14.3 | 1 | 16.7 | - | - | |
| Very severe | 1 | 14.3 | 1 | 16.7 | - | - | |
| Intolerable | 2 | 28.6 | 1 | 16.7 | - | - | |
| Diagnosis of headache | |||||||
| Permanent (it is continuous for a specific time) | 4 | 57.1 | 2 | 33.3 | 1 | 25 | X2=8.94 p>0.05 |
| Intermittent | 3 | 42.9 | 3 | 50 | - | - | |
| Temporary | - | - | 1 | 16.7 | 3 | 75 | |
| Pain relieving method | |||||||
| Resting | 2 | 28.6 | 1 | 16.7 | 2 | 50 | X2=6.49 p>0.05 |
| Sleeping | 1 | 14.3 | 4 | 66.8 | 2 | 50 | |
| Resting+painkiller | 4 | 57.1 | 1 | 16.7 | - | ||
| Factors increasing pain | |||||||
| Standing up | 6 | 85.7 | 4 | 66.7 | 3 | 75 | X2=0.65 p>0.05 |
| Noise | 1 | 14.3 | 2 | 33.3 | 1 | 25 | |
| Nucha and shoulder involvement of pain | |||||||
| Involved | 2 | 28.6 | 2 | 33.3 | - | - | X2=1.65 p>0.05 |
| Not involved | 5 | 71.4 | 4 | 66.7 | 4 | 100 | |
| Increasing of pain by movement | |||||||
| Increasing | 7 | 100 | 4 | 66.7 | 3 | 75 | X2=2.66 p>0.05 |
| Not increasing | - | - | 2 | 33.3 | 1 | 25 |
Table 3: Comparison of the characteristics of the groups regarding headache.
When the symptoms accompanying post-spinal headache in the patients were compared (Table 4), it was observed that there was neck stiffness in 4 patients in First group, 1 participant in Second group and 2 patients in Third group; hyperacusia occurred in 3 patients in First group, 4 patients in Second group, and 2 patients in Third group; tinnitus was present in 1 patient in Second group and 1 patient in Third group; photophobia was present in 5 patients in First group, 3 patients in Second group, and 1 participant in Third group; and nausea developed in 2 patients in First group, 2 patients in Second group, and 1 participant in Third group. When the symptoms accompanying post-spinal headache in the groups were compared, it was determined that there was no statistically significant difference between the groups (p>0.05).
| Group I | Group II | Group III | Test and p value | ||||
| Characteristics | n | % | Test and p value | n | % | n | % |
| Development of neck stiffness | |||||||
| Yes | 4 | 57.1 | 1 | 16.7 | 2 | 50 | X²=2.35 |
| No | 3 | 42.9 | 5 | 83.3 | 2 | 50 | p>0.05 |
| Development of Hyperacusia | |||||||
| Yes | 3 | 42.9 | 4 | 66.7 | 2 | 50 | X²=0.75 |
| No | 4 | 57.1 | 2 | 33.3 | 2 | 50 | p>0.05 |
| Development of Tinnitus | |||||||
| Yes | - | - | 1 | 16.7 | 1 | 25 | X²=1.74 |
| No | 7 | 100 | 5 | 83.3 | 3 | 75 | p>0.05 |
| Development of Photophobia | |||||||
| Yes | 5 | 71.4 | 3 | 50 | 1 | 25 | X²=2.23 |
| No | 2 | 28.6 | 3 | 50 | 3 | 75 | p>0.05 |
| Development of Nausea | |||||||
| Yes | 2 | 28.6 | 2 | 33.3 | 1 | 25 | X²=0.08 |
| No | 5 | 71.4 | 4 | 66.7 | 3 | 75 | p>0.05 |
Table 4: Comparison of the Symptoms accompanying post spinal headache in the patients.
Discussion
Post-spinal headache is one of the most frequent and known complications of spinal anesthesia in the postoperative period since the early years of the administration. In this study, the effect of fluid and caffeine administration on post- spinal headache in patients, who received spinal anesthesia, was examined and the results were discussed.
When the descriptive characteristics and spinal anesthesia-related characteristics of the patients in experimental and control groups were examined, it was found that there was no statistically significant difference between the groups Tables 1 & 2. This result showed that the groups were homogeneous and had similar characteristics.
When the headache-related characteristics of the groups were compared, it was observed that even though there was no statistically significant difference between the groups, there were lower number of patients having headache in Third group to which hydration was administrated, the level of headache was mild, headache was temporary, less patients had pain while standing up, headache did not cover nucha and shoulder, and less patients had pain increasing by movement (Table 3). PSHA develops due to the intracranial stress on the nerves because of the reduction in intracranial pressure depending on CRF loss. The purpose in the treatment of PSHA is to reduce the symptoms until dura repairs itself. Treatment methods can be applied in two ways as conservative methods and invasive methods [27]. In PSHA treatment, it is aimed to increase CRF production by hydration administration involved among conservative methods [32]. Dehydration causes reduction in CRF production. Rate of CRF production increases by oral or intravenous hydration and thus recovery is obtained in the clinical picture [33]. In the study of Bezow, bed rest, hydration, and analgesics were used in the patients developing PSHA and it was determined that PSHA had a recovery of 50% in the first 4 days [34]. It was determined that administration of excess fluid in the patients reduced the pain felt in PSHA but could not prevent its development. It is thought that the main reason of PSHA can be hypovolemia in CRF associated with the continuous leaking of CRF and headache may develop when approximately 10% of the total CRF volume is lost [35]. In a study, when the VAS scores of the cases with post- spinal anesthesia headache were compared, no significant difference was found between the groups [36]. In this study, it can be considered that the pain intensity was felt milder because there was an increase in the CRF volume via the fluids administered but they could not completely prevent development of the pain.
In the study conducted by Masoudifar, et al. to examine the effect of dexamethasone + oral caffeine + acetaminophen after spinal anesthesia on intensity and frequency of postural headache, they specified that frequency and duration of post- spinal headache reduced in the group of dexamethasone+ oral caffeine + acetaminophen compared to the placebo group but the development of headache could not be prevented [37]. In another study, it was determined that caffeine administered in addition to intravenous treatment reduced VAS scores [38]. Again in the studies, it was observed that headache relieved in 75% of the patients, to whom single dose of caffeine was intravenously administered [39, 40]. In the study conducted by Camann, et al. with 40 patients after delivery, they examined the efficiency of oral caffeine administration in PSHA treatment. 300 mg caffeine capsule was given to the patients and it was determined that VAS values at 4th hour reduced at the rate of 300% compared to the placebo group. However, they observed that there was no significant difference between two groups at 24th hour [41]. Again in the study of Esmaoğlu, it was observed that there was no difference in the groups, to whom paracetamol and caffeine were administered after spinal anesthesia, in terms of development of post-spinal headache [42]. In another study, it was specified that oral caffeine reduced the intensity of post-spinal headache [43]. Similar to such studies, in the present study it could be thought that the level of headache was lower in the group, to which caffeine was administered, than the control group.
In a study, it was observed that back movement of the participant during administration of spinal anesthesia had no effect on post-spinal headache [44]. In the study of Choi, et al. they reviewed 13 publications (5 randomized controlled studies, 2 cohort studies, 6 case series) and specified that PSHA started on 1st-7th days after the administration and lasted for 1-7 days [45]. In another study, it was determined that PSHA started at postoperative 2nd hour at the earliest and on the 2nd postoperative day at the latest; headache completely relieved averagely on 5th day between 1-30 days by virtue of the treatment [38]. In another study, headache which was thought to be induced by spinal anesthesia, developed in 41 of patients (17%). No headache was observed in 120 (89%) of postpartum 133 patients, to whom prophylactic fluid was administered, and headache developed in 13 (11%) patients. No headache was observed in 74 (73%) of postpartum 102 patients, to whom prophylactic intravenous infusion was not applied, and headache occurred in 28 (27%) patients. It was shown that hydration was 2.5 times protective in the development of PSHA in postpartum patients [46]. In the study of Vanzetta, et al. they observed that pain of the patients with PSHA relieved by bed rest and intravenous fluid treatment [47]. In this study, it could be thought that hydration administered to the patients caused the pain level of the patients to reduce and the pain to relieve with rest and without using painkiller since it increased CSF production.
In the study, it was determined that there were neck stiffness in 7 patients, hyperacusia in 9 patients, tinnitus in 2 patients, photophobia in 9 patients and nausea in 5 patients in total number of patients with PSHA (Table 4). PSHA diagnostic criteria depending on low CRF pressure are defined by “The İnternational Classification of Headache Disorders”. Among the criteria used in this classification, at least one of the symptoms such as neck stiffness, tinnitus, hearing loss, photophobia, and nausea should accompany to the headache that worsens within 15 minutes after standing up or sitting down or recovers within 15 minutes after bed resting [29, 30, 32, 48]. In the study of Schmittner, et al. they reported that at least one of accompanying symptoms such as nausea, tinnitus, hearing loss, and neck stiffness should be present in the diagnosis of headache [49]. In this study, hyperacusia and photophobia were mostly observed among the symptoms accompanying PSHA in patients. In a study inspecting the accompanying symptoms after spinal anesthesia, it was determined that nausea was present in 60% of the patients, vomiting in 24%, neck stiffness in 43%, symptoms related to vision in 13%, and symptoms related to hearing in 12% [50]. In the study of Özcan, et al. it was observed that nausea-vomiting (54%) and tinnitus (32%) were present among the symptoms accompanying PSHA in the patients [51]. In the study of Kurckowski, it was specified that the most frequent accompanying symptoms of PSHA were photophobia, nausea-vomiting, tinnitus, diplopia, and dizziness [24]. The result of this study is similar to the results of Kurckowski’s study.
Conclusion
As a result of the study, it is concluded that although there was no statistical significance, rate of headache in the hydration group (Third group) was lower than the other groups. Also it was determined that administration of excess fluid after spinal anesthesia reduced the level of post- spinal headache but it could not prevent its development. In accordance with this result, the hypothesis H0 “hydration and caffeine have no effect in development of post-spinal anesthesia headache” was confirmed.
According to these results, it can be recommended to include hydration administration in order to reduce the level of pain felt in PSHA and to repeat randomized controlled studies with larger sample groups. As a result of the study it can be recommended to administer fluid by increasing its amount in order to reduce development of PSHA and also to repeat such randomized controlled studies in patients groups including female patients.
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