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- Amundin, Mats, 1947-, et al.
(författare)
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An echolocation visualization and interface system for dolphin research
- 2008
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Ingår i: Journal of the Acoustical Society of America. - : Acoustical Society of America (ASA). - 0001-4966 .- 1520-8524. ; 123:2, s. 1188-1194
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Tidskriftsartikel (refereegranskat)abstract
- The present study describes the development and testing of a tool for dolphin research. This tool was able to visualize the dolphin echolocation signals as well as function as an acoustically operated "touch screen." The system consisted of a matrix of hydrophones attached to a semitransparent screen, which was lowered in front of an underwater acrylic panel in a dolphin pool. When a dolphin aimed its sonar beam at the screen, the hydrophones measured the received sound pressure levels. These hydrophone signals were then transferred to a computer where they were translated into a video image that corresponds to the dynamic sound pressure variations in the sonar beam and the location of the beam axis. There was a continuous projection of the image back onto the hydrophone matrix screen, giving the dolphin an immediate visual feedback to its sonar output. The system offers a whole new experimental methodology in dolphin research and since it is software-based, many different kinds of scientific questions can be addressed. The results were promising and motivate further development of the system and studies of sonar and cognitive abilities of dolphins. © 2008 Acoustical Society of America.
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| 2. |
- Bergman, Vivi, et al.
(författare)
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Urinary excretion of 8-hydroxydeoxyguanosine and malondialdehyde after high dose radiochemotherapy preceding stem cell transplantation
- 2004
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Ingår i: Free Radical Biology & Medicine. - : Elsevier BV. - 0891-5849 .- 1873-4596. ; 36:3, s. 300-306
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Tidskriftsartikel (refereegranskat)abstract
- The urinary excretion of the hydroxylated DNA base 8-hydroxydeoxyguanosine (8-OHdG) and the lipid peroxidation product malondialdehyde (MDA) was monitored in 11 patients with hematological malignancies undergoing total body irradiation and high-dose chemotherapy preceding bone marrow transplantation. Nine patients showed a prompt increase in urinary 8-OHdG (8-25 times the initial baseline level) on days 0-7 after irradiation onset, the excretion then decreased during the aplastic period and increased again when engraftment took place (in 7 patients). A significant positive correlation was found between urinary 8-OHdG and whole blood leukocyte count, both on day 5 (p = .04, r = .72) and on day 22 (p = .009, r = .80) after irradiation onset. One patient who lacked the first peak of 8-OHdG excretion showed low blood leukocyte counts (less than 2×109/l) before therapy onset, this patient, however, later had a successful engraftment and then also showed considerable increases in both 8-OHdG excretion and leukocyte count. These observations suggest leukocytes play a part in the excretion of 8-OHdG after conditioning therapy preceding bone marrow transplantation. As opposed to the biphasic 8-OHdG excretion, the excretion of MDA showed a single peak appearing on days 11-19 after radiochemotherapy onset, i.e., during the period in which the patients suffered from cytopenia, mucositis, and other side effects of the treatment. It is suggested, therefore, that these clinical manifestations are associated with increased lipid peroxidation. Altogether, these findings illustrate the utility of serial urinary samples for monitoring oxidative stress due to conditioning therapy in clinical practice. They also demonstrate that different oxidative stress markers may behave quite differently regarding their appearance in the urine after whole-body oxidative stress.
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| 3. |
- Börjeson, Sussanne, et al.
(författare)
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Common Symptoms and Distress Experienced Among Patients with Colorectal Cancer: A Qualitative part of Mixed Method Design
- 2012
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Ingår i: Open Nursing Journal. - : Bentham Open. - 1874-4346. ; 6:1, s. 100-107
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Tidskriftsartikel (refereegranskat)abstract
- Background :Colorectal cancer is one of the most common types of tumour in the world. Treatment side effects, together with the tumour symptoms, can result in a ‘symptom burden’. To understand the patient’s burden during chemotherapy treatment and plan effective symptom relief there is a need for more knowledge about the experience of symptoms from the patients’ perspective.Objectives :The study was designed to qualitatively identify and describe the most common symptoms among patients treated for colorectal cancer, and discover whether there are barriers to reporting symptoms.Methods :Thirteen Swedish patients diagnosed with colorectal cancer and treated with chemotherapy were interviewed face-to-face. The interviews were audio-taped and transcribed verbatim. The transcripts were analysed by following the principles of qualitative content analysis.Results :Nine symptoms/forms of distress were identified. Those most frequently expressed were fatigue, changed bowel habits, and affected mental well-being, closely followed by nausea, loss of appetite and neurological problems. Of particular note were the affected mental well-being, the magnitude of the neurological problems described, the symptoms related to skin and mucous membrane problems, and the reports of distressing pain. Barriers to symptom control were only expressed by the patients in passing and very vaguely.Conclusion :This study confirms other reports on most common symptoms in colorectal cancer. It also highlights the early onset of symptoms and provides data on less well-studied issues that warrant further study, namely affected mental well-being, the magnitude of the neurological problems and symptoms related to the skin and mucous membranes. Nurses need to be sensitive to the patients’ need presented and not only noting symptoms/distresses they have guidelines for.
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| 4. |
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| 5. |
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| 6. |
- Drott, Jenny, 1976-
(författare)
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Neurotoxic side effects and impact on daily life in patients with colorectal cancer with adjuvant oxaliplatin-based chemotherapy
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Introduction: Colorectal cancer (CRC) is one of the most common cancers globally. Chemotherapeutic drugs are frequently used in postoperative treatment. The platinum compound oxaliplatin (OXA) is an option for adjuvant treatment of patients with resected CRC, and has been shown to improve survival. OXA-induced neurotoxic side effects are common (e.g. sensitivity to cold, numbness). Neurotoxicity can interfere with the patient’s daily living and affect ability to carry out activities. Because there is no evidence for effective treatment in terms of eliminating neurotoxic side effects, the most successful approaches include early identification, reduction of dose and interruption of treatment. Current research has identified a need for patient-oriented evidence in terms of long-term follow-up of neurotoxicity.Aim: The overall aim of this thesis was to explore OXA-induced neurotoxic side effects in patients with colorectal cancer, and the influence on patients’ daily lives during and post OXA treatment.Methods: The thesis is based on four studies, and includes an analysis of medical records, as well as prospective quantitative and qualitative approaches with longitudinal data collection through a mobile phone-based system. The studies were performed at oncology departments in four hospitals in Sweden. Inclusion criteria were that patients should be at least 18 years of age, and should have been treated with chemotherapy, including OXA (FOLFOX, XELOX), in an adjuvant setting for CRC stages II-III. Study I had a retrospective design, and data involved (n=61) medical records. A structured protocol was used to evaluate the documentation of patients’ neurotoxic side effects. In studies II and III, ten patients were recruited using a strategy of purposeful and consecutive selection according to the inclusion criteria, where OXA-related neurotoxic side effects were assessed. A total of 10 interviews were carried out when neurotoxic side effects appeared (II), and after completed OXA treatment (3, 6 and 12 month’s follow-up) 25 repeated interviews were conducted (III). The prospective longitudinal study IV aimed to identify and assess patient-reported outcomes in terms of neurotoxic side effects, and their impact on patients’ daily activities (n=46). An Oxaliplatin-associated Neurotoxicity Questionnaire (OANQ) was administered in real time to indicate patientreported outcomes. In total, 370 questionnaire responses were available for analysis.Results: The results from the retrospective study (I) showed that a free description of the degree of neurotoxic side effects was given in the patients’ medical records. No formal assessment had been used in the documentation. The findings of the two qualitative studies contribute knowledge about how patients endure neurotoxic side effects early in the treatment phase, and how they learn to live with neurotoxicity in the long-term perspective. Patients coped with their side effects by developing different self-care strategies to restore normality in their daily lives (II-III). Neurotoxic side effects interferes with the patient’s daily activities in a variety of ways. These side effects change in terms of their character and their location in the body over time. The most frequent side effects during treatment were cold-precipitated tingling in the upper extremities and in the mouth/throat. At the end of treatment, neurotoxicity in the lower extremities was considered high and interfered with the patients’ daily activities. The results show significant differences between baseline data, and nine of the patients had not returned to baseline after one year (IV).Conclusion: Neurotoxic side effects affect patients’ daily activities in different ways, with an impact on their physical, psychological, emotional and social life. Patients endured and coped with their side effects in different ways involving self-care strategies to restore normality. The patients’ daily lives were affected by numbness and tingling in the legs and tingling in upper extremity, and they had learned to live with these side effects. The neurotoxic side effects changed character and localisation over time. These results should be taken into account when patients are informed about treatment, and in the dialogue about the benefits and risks.
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| 7. |
- Drott, Jenny, 1976-, et al.
(författare)
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Neurotoxic Side Effects Early in the Oxaliplatin Treatment Period in Patients With Colorectal Cancer
- 2018
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Ingår i: Oncology Nursing Forum. - Pittsburgh, PA, United States : Oncology Nursing Society. - 0190-535X .- 1538-0688. ; 45:6, s. 690-697
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To identify and describe experiences of patients with colorectal cancer (CRC) who have neurotoxic side effects early in the oxaliplatin treatment period, and how neurotoxicity affects their daily lives.PARTICIPANTS & SETTING: 10 patients with stage II-III CRC were included. All were treated with adjuvant oxaliplatin postoperatively and assessed neurotoxicity via a platform-independent mobile phone-based system. Patients were recruited from two hospitals in southern Sweden from November 2013 to August 2014.METHODOLOGIC APPROACH: Qualitative interview study conducted through open-ended, face-to-face, qualitative interviews. Thematic analysis was used.FINDINGS: A main theme was identified.IMPLICATIONS FOR NURSING: Nurses have an obligation to communicate the importance of early detection of neurotoxicity. Mobile phone technology seems to be a valuable tool for monitoring patient-reported neurotoxicity to improve communication and supportive care.
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| 8. |
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| 9. |
- Drott, Jenny, 1976-, et al.
(författare)
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Oxaliplatin-Induced Neurotoxic Side Effects and Their Impact on Daily Activities
- 2019
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Ingår i: Cancer Nursing. - : Lippincott Williams & Wilkins. - 0162-220X .- 1538-9804. ; 42:6, s. E40-E48
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Tidskriftsartikel (refereegranskat)abstract
- Background: Oxaliplatin (OXA) is frequently used in the treatment of patients with colorectal cancer, and OXA-induced neurotoxic side effects are common. Reports on real-time patient-reported neurotoxic side effects and impact on the patient's daily activities are sparse in existing studies. Objective: The aim of this study was to identify and assess patient-reported OXA-induced neurotoxic side effects and their impact on the patient's daily activities, during and after chemotherapy. Methods: In a multicenter prospective longitudinal study, 46 chemo-naïve patients with colorectal cancer treated with postoperative adjuvant OXA-based chemotherapy were monitored during treatment and at 3-, 6-, 9-, and 12-month follow-ups. Patients were recruited from September 2013 to June 2016. In total, 370 Oxaliplatin-Associated Neurotoxicity Questionnaire responses were available for analysis. A mobile phone-based system was used to receive real-time assessments. Results: All patients reported neurotoxic side effects and impact on daily activities during treatment. The side effects changed in character and body location over time and had an impact on the daily activities. Conclusions: The high prevalence of OXA-induced neurotoxic side effects significantly interfered with the patients' daily activities. We found significant differences between baseline data and follow-up time points for neurotoxicity, and the patients had not returned to baseline after 1 year. Implications for Practice: The real-time assessment using mobile phone technology seems to be a valuable tool for monitoring patient-reported neurotoxicity and interventions for tailored care. Effectively identifying neurotoxicity and its impact on the patient's daily activities is important in supportive cancer care.
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| 10. |
- Drott, Jenny, et al.
(författare)
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Oxaliplatin induced neurotoxicity among patients with colorectal cancer : documentation in medical records - a pilot study
- 2014
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Ingår i: Open Journal of Nursing. - : Scientific Research Publishing. - 2162-5336 .- 2162-5344. ; 4, s. 265-274
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Tidskriftsartikel (refereegranskat)abstract
- Patients with colorectal cancer (CRC) can have chemotherapy with oxaliplatin postoperatively.Oxaliplatin can cause acute and chronic neurotoxicity. It is important to be aware of neurotoxicside effects so they can be documented and action taken at an early stage. The study aimed toidentify and explore neurotoxic side effects documented in the medical records of patients withcolorectal cancer treated with oxaliplatin-based adjuvant chemotherapy. Data in this study weremedical records; presenting documentation about patients treated at the University Hospital inthe south of Sweden between 2009 and 2010. A summative content analysis approach was used toexplore the neurotoxic side effects. Identification and quantification of the content of medical recordswere carried out by using a study-specific protocol. “Cold sensitivity” and “tingling in thehands” were the most frequently documented neurotoxicity-related terms in the medical records.This identification was followed by interpretation. Three categories were identified in the interpretivepart of the study: acute, chronic, and degree of neurotoxicity. The results show the importanceof awareness of neurotoxic side effects so that they can be documented and action taken atan early stage. The documentation could be more reliable if patient-reported structured measurementswere used, combined with free descriptions in the medical records. Being able to followthe progression of the symptoms during and after treatment would improve patient’s safety andalso quality of life. The protocol that we developed and used in this review of medical records maybe helpful to structure the documentation in the electronic system for documentation of neurotoxicityside effects.
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