Effect of Postoperative Girdle Following Abdominal Surgery on Pulmonary Function, Mobilisation and Postoperative Pain
Effect of Postoperative Girdle Following Abdominal Surgery on Pulmonary Function, Mobilisation and Postoperative Pain
There is a considerable lack of knowledge in everyday surgical practice concerning treatment
 with a corset after laparotomy, in surgery for incisional hernia or as conservative
 treatment.

 The aims are to elucidate effects of corset treatment on patient experience and pain,
 physiology and abdominal wall strength.

 Effects of corset treatment after laparotomy will be studied in a randomised trial with the
 hypothesis that postoperative corset-use improves respiratory physiology and reduce pain. The
 primary end-point is PeakCoughFlow change, secondary end-points are vital capacity, residual
 volumes and patient perception as measured by the ventral hernia pain questionnaire (VHPQ)
 developed by our group. This study is powered for 50 patients.

 Conclusions from the study are of such a nature that they can be immediately transferred to
 clinical practice.
Presently, there is a significant lack of knowledge in everyday surgical practice concerning
 treatment for incisional hernias and treatment with a corset before and after surgery or as a
 means of conservative treatment. For many years, corsets have been used in surgical
 departments without evidence to support this practice.

 Corsets are expensive and require good patient compliance. Some arguments for the use of
 corsets are reduced pain and tension in the abdominal wall and prevention of the development
 and recurrence of incisional hernias, as well as their use as a truss in cases where
 conservative treatment is decided on.

 The aim of this project is thus to ameliorate the lack of knowledge surrounding corset use.

 More specifically, the aims of the project are to clarify the effects of corset use on

 1. Physiological parameters

 -  Measured with spirometry, Vital capacity (VC), Forced Expiratory Volume (FEV), Peak
 Expiratory Flow (PEF) and with coughPEF

 2. Patient comfort, pain and self-perceived experience

 -  Measured with VAS scale for pain. VHPQ (ventral hernia pain questionary) for pain.
 Recording of medication. Grade of mobilisation.

 Corset treatment has been thought to affect cardiovascular and respiratory function as well
 as intra abdominal pressure both in positive and negative directions. There are no scientific
 publications that specifically describe and evaluate these effects. One reason for this could
 be that the assessment of such parameters is difficult and time-consuming in clinical
 practice, for instance spirometry. Less complicated alternatives e.g. Peak Expiratory Flow
 rate (PEF) has been considered too imprecise. However, recently, a simpler and more efficient
 instrument has been developed for measuring lung function, the Peak Cough Flow (PCF). It has
 been validated for use in pulmonary function testing in patients with neuromuscular
 disorders, where it is used to predict the risk of an inadequate coughing response and mucus
 clearance. Moreover, portable digital spirometers have been developed that can be easily used
 in an ambulatory setting. Postoperatively, similar problems may arise with a reduction in
 vital capacity. It is therefore important to investigate the effects of corsets on lung
 function.

 Many patients that undergo laparotomy have an indwelling urinary catheter during the first
 postoperative days, often as a result of epidural anaesthesia but also for monitoring of
 fluid balance. A urinary catheter also allows for the measurement of the intra abdominal
 pressure, which, together with the measurement of systemic blood pressure, gives a good
 estimate of physiological parameters which can be used to compare different treatment groups.

 A randomised controlled study concerning the postoperative use of corsets after laparotomy.

 Hypothesis: Postoperative corset-use improves respiratory physiology as measured using the
 PCF without impairing other spirometric parameters. Corsets also reduce pain and discomfort
 after surgery.

 Consecutive patients undergoing laparotomy at the Centre for Gastrointestinal surgery at the
 Karolinska University Hospital are asked whether they would accept to participate in a
 randomised study where one arm receives a corset for five days postoperatively and the other
 does not receive a corset after laparotomy. The primary end-point is PCF change, secondary
 end-points are vital capacity, residual volumes and patient perception as measured by the
 VHPQ. A GCP-trained research nurse with extensive experience will be in charge of monitoring
 and collection of data. PCF will be measured using a portable PCF apparatus (Peak flow meter,
 HS Clerment Clarke International) whereas other spirometric parameters are measured using a
 portable computer-assisted vitalograph (IM-Medico ML 2525). Pain and the functional status of
 the patients will be measured using the VHPQ as described above and the EuroQoL.

 Based on previous measurements, a normal PCF without corset is assumed to be around
 360ml/min. Assuming that the standard deviation is 40ml/min and that the corset improves
 performance by 10%, 21 patients will be required in each group (42 in total) at 95%
 significance level and power of 80%. In order to compensate for patient drop-out, we plan to
 include 50 patients. If intra abdominal pressure rises above 28cmH2O or if there are signs of
 wound infection, the corset will be removed. The wound will be photographed on day five in
 all patients.
The inclusion in the study is done to reflect the normal population on a colorectal surgery
 ward.

 Inclusion Criteria:

 -  Patients undergoing laparotomy with a midline incision more than 12 cm

 -  Over 18 years of age

 -  Planned time at ward less than 10 days

 -  Not on oxygen treatment at home

 The exclusion criteria are minimized but made to avoid obvious confounding

 Exclusion Criteria:

 -  Dementia

 -  Not possible to understand instructions

 -  Children (<18 years of age)

 -  Not involved in other studies during the project